Selkar the Fire-Keeper

Character details for Selkar the Fire-Keeper from Tyranny of the Daleks.  This is using the second edition rules from the Doctor Who Roleplaying Game from Cubicle 7. 

SELKAR THE FIRE-KEEPER

Concept: Custodian of fire

Focus: Firekeeper

Homeworld: Galentor

Tech level: 1

Short-term goal: To keep the Holy Fiery Orb burning

Long-term goal: To help the Pham to reclaim their ancient magical power in a new Golden Age

Awareness 3, Coordination 2,

Ingenuity 2, Presence 3,

Resolve 4, Strength 3

Skills: Athletics 1, Conflict 0, Convince 3 (Inspire hope), Craft 3 (Firekeeping), Intuition 2, Knowledge 2*, Medicine 1**, Science 0, Subterfuge 1, Survival 3 , Technology 0, Transport 0

*limited to Galentor myths and rituals

** limited to primitive first aid

Equipment: Battered, non-functioning pocket computer (which Selkar calls a “Kommpta”) which when working is a terminal for the previous technological settlement’s digital data banks.

Fire-Keeper tools, including a flint striker, primitive tinder pouch, bone knife and ritual ash container.

Story Points: 3

Selkare the Fire-Keeper

Character notes

A respected elder-in-training among the Pham of Galentor, Selkar serves as guardian of the tribe’s sacred flame, known as the Holy Fiery Orb. Though only around thirty years old, he carries the immense cultural burden of preserving both the tribe’s literal fire and its symbolic hope for the future. Gentle, patient, and deeply compassionate, Selkar is far more comfortable tending children and embers than facing violence.

To the Pham, Selkar’s sacred relics and inherited vestments represent a direct link to the lost Golden Age before the Dalek conquest. Unknown to him, his revered “Kommpta” is actually a damaged portable computer from the pre-Dalek era, its data long inaccessible without advanced repairs.

The Fire-Keeper is a revered and honoured position within the Pham, the tribe of human survivors on Galentor that the Doctor meets.  Since the Dalek onslaught, and the reduction of the humans to a primitive mode of survival, keeping a fire lit at all times has become a deeply ingrained part of their culture. Fire is needed for so many things; for cooking, boiling water, heating, light, and for signalling. Selkar’s role was passed down to him from his father, Zarkal, and he learned the ways of the Fire Keepers through a lengthy and sometimes painful apprenticeship. 

Selkar is thought of highly for his caring attitude, especially with the precious children of the Pham, of which there are not many.  He works diligently in his role and since taking over the role four years ago, there have been no incidents in which the Pham’s Holy Fiery Orb has gone out.  He has no family of his own but is loved and respected by the rest of the Pham.

The role of the Fire-Keeper is, in keeping with the teachings of Lentargi, to keep alive the fire of hope that one day the people of the Pham will reclaim their heritage of being wielders of technology, which is a magical force to them.  As well as its practical uses,  the need to keep the fire burning symbolises their cherished hope that one day they will ascend to the golden age that existed before the coming of the Evil Ones, that is the Daleks.  Keeping the fire burning is a physical manifestation of keeping their hope alive.

As well as his sacred clothes, he wears a necklace with a centrepiece of a fearsome magical relic of the ancient golden age, called a “Kommpta”. It is said that the Kommpta is a repository for ancient magical lore, and when the Pham ascends once more to their rightful place, it will reveal all the ancient secrets to the Fire Keeper. In reality, the centrepiece is a battered, non-functioning miniature portable computer that once allowed direct access to the original settlers’ digital data banks.

Whilst Selkar is a reasonably strong man of average height and in his early thirties, he has only a little experience of fighting and does not carry any weapons. Whilst he is courageous and brave, his best tactic in terms of self-defence is to run, in combination with his knowledge of the terrain as a means for survival.

Within the Pham, he is noted for not only being caring, but also raising people’s spirits and hopes. He takes his role as Fire-Keeper to heart, and often can be found providing encouragement and support when he can.  He can calm fears and raise morale.  He is generally treated with respect by the other members of the Pham. His reliance on his myths and tales of magic make it impossible for him to conceptualise that the Golden Age he so dreams of was one of technology rather than sorcery or spells.

In the hierarchy of the Pham, Selkar accepts firstly the leadership of Thural in spiritual matters in the teachings of Lentargi, and secondly Elara in terms of practical survival and feeding the Pham. The role of Fire-Keeper is somewhat esoteric in comparison, but in Selkar a respected one purely down to his personal qualities and the admiration he is held in.

Description

Physically, he is around 5 foot 10 inches tall, with short brown hair, and strong, rugged features that suggest years of outdoor life and exposure to heat. He is in his early thirties. His expression is calm but alert, always looking out for danger from beyond the forests and ruins of Galentor.  

He wears some of the tribe’s oldest clothing as a mark of the honour in which his position is held, showing the ancient reverence for the role of the Fire-Keeper, going right back to the earliest days of the Pham in surviving the Dalek massacre.  This includes some ancient shoes, trousers (referred to as his “jeenz”) and a blue short sleeved top with a lighter blue stripe across it, along with pale shoes that are dirty and scuffed.

These clothes are sacred vestments handed down directly from the Golden Age before the Dalek conquest of Galentor, washed ritually to keep the Fire-Keeper pure and to maintain a direct link with the ancient humans who lived with their magical technology before the present wild times.  They are the clothes from the pre-conquest era that remain in the best condition due to the reverence in which they are held.

The Ember Sigil of Zahkur

Selkar has a secret which gnaws at his soul, darkening his days. He has lost the Ember Sigil of Zakhur, a family heirloom of ritual significance that dates back to before the Dalek conquest of Galentor, and its loss has caused him endless worry and sleepless nights, both for its importance to the Pham and how the discovery of its disappearance may ruin his standing.

In the secret magical language used by the spiritual leaders of the Pham, including Selkar, it is called the Za-Kommpta of the First Flame.  It is one of their holiest relics ever entrusted to the Fire-Keepers. It is a small, palm-sized device which in reality was an old emergency thermal regular and ignition controller from the first Federation settlement ship to land on the planet.  It was once used by engineers to activate industrial fusion furnaces and emergency power systems.

The people of the Pham no longer understand its true purpose.  To them, it is a sacred magical object forged by the “Sky Ancestors” during the Golden Age of Light. It is said to contain the “breath of the Eternal Fire”, and legends claim the first Fire-Keeper used it to relight the Holy Fiery Orb after the Daleks darkened the world with ash and death. This is true in mythical terms; following the Dalek conquest, there was one last time that the Sigil was used to ignite a pile of tinder the Pham had collected with a sizeable spark. The Sigil has not worked since.

The Ember Sigil of Zahkur

Zakhur is believed to have been the first Fire-Keeper, decades ago after the Pham established itself following the Dalek invasion.

Physically, the relic is beautiful and mysterious. It is  a flat oval of dark silver metal, covered in faded glowing lines beneath scratched translucent panels.  It has a cracked red thumb-pad at its centre with tiny unreadable symbols running around its edge.  One side bears the scorched emblem of the Federation at the time of the planet’s settlement. When shaken, components rattle inside.

Though long without power, it occasionally emits a tiny spark of red light when warmed by flame, something the Fire-Keepers interpret as proof of its divine nature.  The Ember Sigil was passed directly from Fire-Keeper to Fire-Keeper for generations. According to tribal law, no outsider may touch it without ritual cleansing. During the sacred Night of Rekindling, the Sigil is held above the tribe’s great fire, while the Fire-Keeper recites the ancient promise:

“While the Flame endures, Hope endures.”

The Sigil represents far more than merely fire. It symbolises humanity’s lost mastery of the “magic” of technology, the sacred duty of the Fire-Keeper and the hope that one day the Golden Age will return. Many believe it contains sleeping knowledge that will awaken when “the stars are right” and others that it can summon hidden cities beneath Galentor or event war-monsters to fight for them (that is mythical  representations of tanks and artillery).

Unknown to Selkar, the device actually contains a partially intact encrypted access key tied to ancient underground emergency systems beneath the ruined human settlements of Galentor, as during the Dalek attack the device was hastily repurposed. If restored, it could genuinely unlock forgotten technology caches.

Selkar lost the Ember Sigil around six months ago. During a violent electrical storm deep in the forests near the Pham encampment, he travelled alone to recover rare black resin wood to keep the Holy Fire burning during the rainy season. While crossing the shattered ruins of an overgrown pre-conquest roadway, he was startled by the distant sounds of Dalek hoverbout engines.

Terrified, Selkar ran into the woods. Only hours later, after hiding behind a fallen metal structure until dawn, did he realise the Ember Sigil must have slipped out of the leather pouch beneath his tunic in which he kept it for good fortune when traversing the land.

He searched frantically, but could not find it. Worse still, strange tracks marked the mud around the area in which he had thought he had lost it, circular impressions in the ground with thin drag lines.  Selkar became convinced one of the “Forest Demons” of Pham legend had taken it.  In truth, an Intruder Dalek had spotted it on the floor and taken it.

Selkar has told no one that it has gone. Amongst the Pham, losing such an important relic would be considered a terrible spiritual failing. Some elders, such as Thural or Elara, might even believe the Holy Fire itself had become cursed because of such carelessness. Selkar fears losing his sacred position and shaming his father’s memory. Since then he has secretly made journeys into dangerous ruins and forbidden forests trying to recover it, and has found this exhausting. Beneath his calm exterior, he is now somewhat anxious and depressed. Every time the Holy Fire flickers unexpectedly, Selkar wonders silently if the ancestors are judging him.

The Secret of Veldara

Selkar is, although he is not aware of it, an old acquaintance of Jorath the Path-Maker. They first met twelve years ago, when both were adventurous young men exploring the forbidden ruins beyond the lands of the Pham. They were united by their friendship with a brave and curious young woman named Veldara, the daughter of Koralyn, the Pham’s healer at that time. Both men loved her in different ways, and together they ventured into the dreaded Glass Plains, the site of a huge battle when the Daleks conquered Galentor, where they discovered an ancient underground human installation dating from before the conquest. Deep within its ruins they accidentally activated a mysterious crystalline relic from the pre-invasion “Golden Age”, unknowingly awakening long-dormant security systems and a damaged psychic archive filled with the memories of humanity's last stand on Galentor against the Daleks.

The resulting chaos was catastrophic. They were attacked by a seriously damaged Dalek drone that had been left when the installation was invaded. The chamber collapsed around them, and the psychic energies unleashed by the shattered archive overwhelmed the minds of everyone present. During the confusion Veldara vanished without trace, while Jorath was badly injured. Selkar destroyed the malfunctioning archive in an attempt to save his friends. The two men escaped with their lives, but the tribe declared the ruins cursed and forbade anyone from returning.

The psychic shock along with a blow to the head permanently damaged Selkar's memory. He remembers only scattered fragments of that terrible night: falling ash, blue fire, Veldara calling his name, and Jorath dragging him to safety beneath a blood-red sky. He cannot remember precisely how they met, what truly happened within the ruins, or whether he somehow failed Veldara. Jorath remembers more than he does, but the painful memories have driven a quiet distance between the two men, each carrying guilt for the tragedy.

Unknown to either of them, Veldara did not perish. The installation’s security systems erroneously triggered a forgotten Dalek emergency temporal field, hurling her forward through time into suspended stasis somewhere beneath the surface of Galentor. Selkar's recurring dreams of Veldara calling to him are more than troubled memories: they are faint psychic echoes from someone who is still alive, waiting to be found. This mystery could become an intriguing adventure awaiting the time-travellers on Galentor.

Concept: Custodian of fire 3

Forest maps for roleplaying using Inkarnate

I've been having a lot of fun recently working on maps for the Tyranny of the Daleks roleplaying scenario. I've been using Inkarnate, an easy to use mapping and floor plan website.  At the moment I'm only using the free assets, but these alone are really useful and varied.  

At present I'm working on creating maps or plans of the various scenes from the fan film.  The scale provided is in accordance with the Doctor Who roleplaying game from Cubicle 7, which is one range being equivalent to ten metres (normally) on foot.

It's enjoyable learning how to use a new application, and I'm excited about developing my skills with it. 

The TARDIS landing site

The clearing in which Garleth and Loran are encountered

Karvtal, world of ice and frozen forests, a planet of the Galen Alpha system

This is a write up of Karvtal, a world of ice and deep forests, in the Galen Alpha planetary system, a setting for the Tyranny of the Daleks scenario, using the Second Edition of the Doctor Who Roleplaying Game from Cubicle 7.

Third Planet of Galen Alpha

Karvtal, seen from space during the northern hemisphere's summer

Mass : 0.94 x Earth

Diameter: 14,282 kilometres

Density: 3.68 grammes per cubic centimetre

Average temperature: -27.7 degrees Celsius (minimum -110 degrees Celsius, maximum 13.2 degrees Celsius)

Rotational Period: 2.44 days

Orbital Period: 1.5 years

Surface gravity : 0.749 g

Semi-Major axis of orbit around Galen Alpha : 1.35 AU

Eccentricity of orbit : 0.0182

Inclination of orbit: 0.2 degrees

Obliquity : 8.57 degrees

Karvtal is a world balanced on the edge of ice.

It is the outermost of the three inner terrestrial worlds of Galen Alpha, orbiting beyond the warm seas of Galentor and just outside the Cyndor Belt. It is a broad, cold super-terrestrial world of low density and expansive horizons, a place of deep forests, glacial valleys and immense storm systems that coil across entire hemispheres. Though less obviously hospitable than Galentor, and receiving only around two-thirds of Galen Alpha’s sunlight, Karvtal possesses a quiet grandeur and a geological vitality that make it one of the most compelling destinations in the system. 

Formation and Early History

Karvtal formed in the outer region of the inner system, beyond the optimal temperate zone but well inside the domain of the gas giants. During the protoplanetary era it accreted from volatile-rich planetesimals, giving it a significant inventory of water ice alongside silicate rock and metal.

Unlike the inner desert world Pentaurus, Karvtal retained much of its primordial water. Early heavy bombardment scarred its crust, and several of the largest impact basins remain visible today beneath ice sheets and sedimentary plains. As the young Galen Alpha brightened, Karvtal never quite crossed into full habitability; instead, it stabilised in a prolonged glacial regime.

Its iron core remains partially molten, sustaining a magnetic field that protects the surface from stellar radiation. Slow mantle convection drives modest tectonic activity, enough to renew the crust over geological timescales without plunging the planet into global resurfacing events.

Differentiation occurred early, producing:

A metallic core capable of sustaining a dynamo

A convecting mantle

A thick lithosphere, particularly in colder high-latitude regions

Its lower gravity, at roughly three quarters of Earth’s, allows mountains to rise somewhat higher relative to crustal strength, while atmospheric circulation behaves on a broader scale due to its longer rotational period.

Orbit and Seasonal Character

Karvtal circles Galen Alpha once every year and a half. Its orbit at approximately 1.35 AU is nearly circular and lies very close to the system’s primary plane. With only a modest axial tilt of just under nine degrees, seasonal contrasts are muted. Winters are long and severe at high latitudes, but not wildly variable year to year. Summers are brief and cool.

The planet rotates once every two and a half days, giving it broad atmospheric circulation cells and expansive storm systems rather than rapid, tightly wound weather patterns. From orbit, cloud bands sweep across ocean basins in slow spirals, sometimes stretching thousands of kilometres. Climate patterns are driven more by latitude and ocean circulation than by extreme seasonal swings.

The maximum temperature ever recorded at the equator, in sheltered dark-soil basins during peak insolation, is 13.2 degrees Celsius. That is exceptional. Most of the planet remains below freezing for much of the year.  

Composition and Atmosphere

Surface atmospheric pressure 116 kPa at sea level

Karvtal Atmosphere (by volume)

• 74.8% Nitrogen (N₂)

• 20.6% Oxygen (O₂)

• 1.9% Argon (Ar)

• 1.2% Carbon dioxide (CO₂)

• 0.45% Water vapour (variable, equatorial average)

• 0.04% Neon

• 0.01% Methane (biogenic and geological trace)

• trace krypton, xenon and others

Karvtal is slightly larger in diameter than Earth but less massive, giving it lower surface gravity. Its bulk density indicates a silicate mantle and iron core comparable in structure to Earth’s, though proportionally somewhat more volatile-rich in its crust.

Its atmosphere is thicker than Earth’s, dominated by nitrogen with substantial oxygen and an elevated carbon dioxide fraction. Surface pressure is moderately higher than Earth’s, enhancing greenhouse retention and helping keep equatorial oceans from freezing solid.

The oxygen content makes the air breathable to humans. The higher carbon dioxide level would feel noticeable but not immediately harmful. Radiation levels at the surface are slightly less than Earth’s, moderated by both atmosphere and magnetosphere.

Climate and Weather

Karvtal’s climate is defined by latitude.

At the poles, ice sheets extend for thousands of kilometres, their winter temperatures plunging into extreme cold. These ice masses are kilometres thick in places and grind slowly outward, calving into steel-dark seas.

Mid-latitudes host vast taiga forests: dark, conifer-like growths adapted to short summers and long winters. Snowfall is common, and seasonal thaws create sprawling meltwater plains.

The equatorial zone contains cold oceans that remain largely ice-free due to oceanic heat transport and atmospheric greenhouse warming. Sea ice forms seasonally along margins but rarely seals the oceans entirely.

Storms are large and slow-moving. Low-pressure systems build over ocean basins and drift for days, bringing heavy snowfall inland. Blizzards can persist across continental interiors, reshaping dunes of powder-fine snow.

Lightning storms are rare but spectacular, often associated with volcanic ash plumes.

Karvtal's orbit around Galen Alpha

Surface and Geological Activity

From space, Karvtal is striking.

Broad dark continents dominate the visible hemisphere, interspersed with cold blue oceans.  Around 41% of the surface is covered by oceans. The mid-latitude forest belt appears almost black-green, absorbing what light it can. Polar caps gleam white, edged by jagged ice shelves.  

Several major mountain chains arc across continents, their peaks perpetually snow-clad. Deep fjord systems carve high-latitude coastlines where ancient glaciers have retreated and advanced over millennia.

A vast tectonic rift valley splits one major landmass. Here, geothermal heat keeps the ground seasonally ice-free, and fumaroles vent steam into sub-zero air. These geothermal corridors are biological refuges and ideal locations for exploration.

Volcanism exists but is moderate. Basaltic shield volcanoes occasionally breach ice sheets, melting temporary lakes that refreeze into chaotic, fractured ice plains. Seismic activity is steady but not catastrophic; earthquakes and tremors ripple through crustal fault lines as mantle convection continues its slow work.

Impact craters are visible in older terrains, though many have been softened by ice and erosion. Some subglacial basins likely conceal preserved impact structures beneath kilometres of ice.

The Biosphere

Life on Karvtal is not exuberant. It is enduring.

The dominant terrestrial lifeform is the Talarith tree analogue: dark-spired, antifreeze-bearing forest giants that form dense taiga belts. Their pigments are tuned for lower light levels, and their vascular systems resist freezing.

Beneath them grow symbiotic vines and mineral-harvesting microbial mats that build soil from bare rock.

Fauna includes migratory herbivores adapted to snow and cold, pack-hunting predators that navigate blizzards by seismic sensing, and burrowing organisms that aerate frozen ground.

In the oceans, cold nutrient-rich waters support large filter-feeding organisms and extensive kelp-like reef systems anchored to basalt shelves.

And in the polar ice lives something rarer and more mysterious: large glacial predators that enter metabolic suspension during deep winter and roam subglacial caverns near geothermal rifts. They are few, ancient, and difficult to study.

Life survives here through:

• Antifreeze biochemistry

 • Slow metabolism

 • Symbiotic nutrient exchange

 • Seasonal dormancy

 • Efficient oxygen utilisation

Karvtal’s ecosystems operate on longer timescales than Earth’s. Growth is slow. Extinction is slower.

From Velnara

From the surface of its moon Velnara, tidally locked in its orbit, Karvtal dominates half the sky. Its polar caps are brilliant white arcs. Dark forest belts are clearly visible. Storm systems drift visibly over days. Occasional volcanic plumes rise like faint scars against the snowfields.

The view is serene and forbidding at once.

Surface Exploration and Points of Interest

Karvtal is a world of brooding skies and expansive wilderness. For time travellers, it offers a range of compelling environments:

The Hadrien Rift

A tectonic fracture zone thousands of kilometres long, where crustal plates are slowly pulling apart. Steam vents, shallow magma chambers and geothermal fields dot the landscape. Subsurface lava tubes could hide secrets or long-lost installations.

The Veloran Glacial Fjords

Immense ice-carved inlets where sheer cliffs plunge into dark waters. Subglacial melt channels occasionally collapse, creating sudden catastrophic floods.

The Eos Thermal Basin

A high-latitude volcanic caldera region where geothermal warmth maintains a microclimate of evergreen forest within a snowbound plateau.

The Cyndor Impact Field

A chain of partially eroded impact craters from early belt debris, now forming interconnected lakes and mineral-rich basins.

The Nareth Expanse 

A continent-spanning ice shelf fractured by tectonic rifting, beneath which lies a subglacial ocean connected to geothermal heat sources. Beneath kilometres of ice, liquid water caverns and microbial ecosystems exist.

Karvtal seen from its south pole during the southern hemisphere's winter

Tarack, Volcanic Moon of Galentor

This is a write up of Tarack, the Moon of Galentor in the Galen Alpha planetary system, a setting for the Tyranny of the Daleks scenario, using the Second Edition of the Doctor Who Roleplaying Game from Cubicle 7.

Dalek battleship in high orbit around Tarack

Mass : 0.0106 x Earth ( 0.861 x Moon )

Diameter: 3,436 kilometres 

Density: 2.98 grammes per cubic centimetre

Average temperature: -35.4 degrees Celsius  (minimum -158 degrees Celsius, maximum -7.59 degrees Celsius)

Rotational Period: 7.88 days (tidally locked)

Orbital Period: 7.88 days

Surface gravity : 0.146 g

Semi-Major Axis of orbit around Galentor : 164,380 kilometres

Eccentricity of orbit : 0.0199

Inclination of orbit: 1.65 degrees

Obliquity : 2.29 degrees

Tarack is the sole natural moon of Galentor and one of the most visually arresting bodies in the Galen Alpha system. Though slightly smaller than Earth’s Moon, it is geologically far more active. Its deep red surface, streaked with darker lava plains and fractured highlands, makes it unmistakable from orbit and unforgettable in Galentor’s night sky.

There is no native life on Tarack. It is a world shaped by heat, stress and tidal strain. It is sometimes compared to Io, a moon of Jupiter in Earth's Solar System.

Formation and Early Evolution

Tarack most likely formed early in the history of the Galen Alpha system from debris placed into orbit around Galentor following a colossal impact event. Its relatively low density of 2.98 g/cm³ suggests a silicate-rich body with a modest iron core, consistent with differentiation during a molten early phase.

In its infancy Tarack orbited much closer to Galentor. Over time, tidal interactions transferred angular momentum from Galentor’s rotation into Tarack’s orbit, gradually pushing the moon outward to its present distance of approximately 164,000 kilometres.

Tarack’s orbital eccentricity is the residual outcome of its tidal evolution and the balance between internal energy dissipation and orbital circularisation. This small but persistent eccentricity is sufficient to generate ongoing tidal heating within its interior, which has led to huge changes over millions of years to the moon’s surface and a great deal of seismic and volcanic activity at present.

Orbit and Relationship with Galentor

Tarack orbits Galentor every 7.88 days and is tidally locked, always presenting the same hemisphere to its primary. Galentor’s rapid rotation period of 0.997 Earth days means Tarack rises and sets in the sky over the course of each Galentorian day, though its phase cycle spans the full 7.88-day orbital period.

From Galentor’s surface, Tarack appears immense. At a distance of roughly 164,000 kilometres and with a diameter of 3,436 kilometres, its apparent diameter is just over 1.1 degrees. This is more than twice the apparent size of Earth’s Moon as seen from Earth. It dominates the night sky and provides significant nocturnal illumination at full phase.

Its reddish coloration is clearly visible from Galentor without optical aid. At full phase it casts a faint copper glow across oceans and coastlines, giving rise to numerous cultural associations with fire, omens and endurance.

Tarack also exerts measurable tidal forces on Galentor’s oceans, contributing to pronounced tidal ranges in some coastal regions.

A small fraction of Tarack’s volcanic output does not fall back to its surface. During major eruptions, sulphur dioxide gas, sodium vapour and extremely fine dust can escape the moon’s weak gravity and become ionised by stellar radiation. Because Tarack orbits deep within Galentor’s magnetosphere, these charged particles are captured along magnetic field lines, forming a tenuous plasma torus along Tarack’s orbital path. 

Some of this ionised material is funnelled toward Galentor’s polar regions, where it enhances auroral activity, occasionally producing brighter and more complex displays than would otherwise occur. The total mass transferred is extremely small and environmentally insignificant at the surface, but in the upper atmosphere it creates a subtle and beautiful electromagnetic connection between the volcanic moon and the living world it orbits.

Tarack's orbit around Galentor

Internal Structure and Composition

Tarack is a differentiated rocky body composed of:

• A small iron-nickel core
• A thick silicate mantle
• A basaltic crust enriched in iron-bearing minerals

The red coloration visible from space is primarily due to iron oxides within its crustal rocks, especially hematite formed through oxidation of iron-rich basalts. Volcanic resurfacing has spread these materials widely across the moon.

Its mantle remains partially molten at depth. Although Tarack’s eccentricity is modest, the tidal forces exerted by Galentor are substantial because of the moon’s relatively close orbit. The resulting internal flexing generates steady tidal heating, estimated at perhaps half to two-thirds of Io’s heat flux. This makes Tarack one of the more geologically active rocky moons in its system despite lacking any outer resonant companion.

Surface and Major Features

From space, Tarack presents:

• Broad, dark basaltic plains formed by repeated lava flooding
• Massive shield volcanoes rising several kilometres high
• Extensive rift valleys and graben systems
• Large impact basins partially filled with younger lava flows
• Long tectonic scarps caused by tidal flexure

Unlike Io, Tarack lacks vivid sulphur deposits. Its palette is dominated by burnt reds, dark charcoal blacks and occasional brighter orange streaks where fresher lava has oxidised.

The surface is comparatively young in geological terms. Large ancient impact craters are present but often softened or partially buried by lava. Volcanic provinces cluster preferentially along zones of tidal stress, particularly near the equator and at longitudes facing and opposing Galentor.

If one were to stand on Tarack’s surface, gravity would feel extremely light at only 0.146 g. Movement would be slow and bounding. The terrain would be rugged and sharp, composed of fractured basalt, frozen lava channels and volcanic ash deposits. The horizon would appear relatively close due to Tarack’s small radius.

On the hemisphere facing Galentor, the primary world would hang in the sky, immense and blue-green, slowly rotating over the course of a Galentorian day.

Tidal Heating Mechanism

Tarack’s tidal heating arises from periodic distortion caused by its slightly elliptical orbit. As it moves closer to and farther from Galentor during each 7.88-day cycle, gravitational stresses flex its interior. This continual deformation generates frictional heating within the mantle.

Although the orbit is gradually evolving toward circularisation, the timescale for complete damping of eccentricity is long, potentially hundreds of millions of years. For the purposes of the present era, Tarack remains persistently active.

Volcanism

• Small to moderate lava effusions occur several times per year globally.
• Significant regional eruptions occur perhaps once every few decades.
• Lava is predominantly basaltic and highly fluid in low gravity, producing long, thin flows.
• Lava fountains may reach several kilometres in height.

Volcanic plumes are not as extreme as Io’s sulphur geysers, but they are dramatic by terrestrial standards. Thermal hotspots are visible from orbit.

Seismic Activity

Tarack experiences frequent tidal quakes.

• Minor quakes occur daily.
• Moderate magnitude five to six events occur several times per year.
• Larger magnitude seven events may occur once every few decades.

Because of the moon’s fractured crust and low gravity, seismic waves can reverberate for extended periods.

Tarack does not exhibit plate tectonics. Instead, it operates under a stagnant lid regime with crustal rifting and volcanic resurfacing acting as primary mechanisms for heat release.

Atmosphere and Climate

Tarack does not retain a substantial atmosphere. Its surface gravity is too low to hold one over geological timescales.

Instead, it possesses a tenuous exosphere composed of:

• Sulphur dioxide from volcanic outgassing
• Sodium and potassium vapour
• Trace carbon monoxide and carbon dioxide

Surface pressure is effectively negligible. There is no weather, no wind and no hydrological cycle.

Temperatures vary widely:

• Equatorial daytime highs may reach approximately −8°C under direct stellar illumination.
• Nighttime and polar regions can drop below −150°C.

The absence of an insulating atmosphere produces sharp thermal contrasts between sunlit and shadowed terrain.

Appearance from Space and Surface Perspective

From orbit, Tarack appears as a red volcanic world marbled with dark lava seas and intersected by pale tectonic scars. Occasional thermal glows mark active volcanic regions.

From Galentor’s surface, it is a dominant celestial presence more than twice the apparent size of Earth’s Moon. Its 7.88-day phase cycle produces dramatic crescents and striking eclipses.

From Tarack’s own surface, the sky is black even in daylight. Galentor looms vast and luminous on the near side, filling a substantial portion of the sky and displaying visible oceans, continents and cloud systems. Stars remain visible even during the day.

Long-Term Outlook

Tarack’s orbital eccentricity will slowly decline over very long timescales. As it does, tidal heating will gradually diminish. However, this process unfolds over hundreds of millions of years. For all practical historical and narrative timescales, Tarack remains a restless, volcanically active moon.

The TARDIS above Tarack, with Galentor in the distance

Galentor, natural garden world of the Galen Alpha System

This is a write up of Galentor, a planet in the Galen Alpha planetary system, and the main setting for the Tyranny of the Daleks scenario, using the Second Edition of the Doctor Who Roleplaying Game from Cubicle 7.

Galen Alpha c

Second Planet of the Galen Alpha system

Dalek shuttle leaving Galentor orbit

Mass : 0.94 x Earth

Diameter: 12,938 kilometres (equatorial)

Density: 4.95 grams per cubic centimetre

Average temperature: 24.6 degrees Celsius  (minimum -56.4 degrees Celsius, maximum 71.2 degrees Celsius)

Rotational Period: 0.997 days

Orbital Period: 11.8 months

Surface gravity : 0.913 g

Semi-Major Axis of orbit : 0.97 AU

Eccentricity of orbit : 0.0272

Inclination of orbit: 0.57 degrees

Obliquity : 7.57 degrees

Surface pressure : 107.9 Kpa at sea level

Atmosphere by volume:

76.45% nitrogen

22.5% oxygen

0.45% water vapour (varies)

0.42% argon

0.029% carbon dioxide

0.12% neon

0.02% hydrogen

0.003% methane

0.001% nitrous oxide

0.0008% krypton

0.0007% ozone

0.00009% xenon

0.005% trace biogenic organics

Introduction

Galentor is the living heart of the Galen Alpha system: a temperate, ocean-dominated world orbiting just inside the system’s classical habitable zone. It is the second planet out from the star Galen Alpha.IItWhere the inner planet Pentaurus is scorched and desiccated, and the outer giants loom in distant splendour, Galentor alone carries a fully developed biosphere and stable surface oceans. It is the natural focal point for exploration, diplomacy, and adventure. 

Galentor is widely regarded as one of the finest naturally occurring biospheres known to the Federal Empire. Earth, by the 42nd century, is a ruined world from centuries of overpopulation, destruction of natural ecosystems and climate change.  In comparison, Galentor is a pristine, beautiful wilderness and Xafonix, the planetary scientist leading its settlement, has proved conclusively that it is even more suited for life than Earth had been prior to the industrial period and the homeworld’s subsequent devastation by humanity.

To explorers and scientists alike, Galentor represents a paradox: a world of immense biological richness flourishing in one of the most isolated regions of the Milky Way, far from dense stellar nurseries, supernova shocks, or frequent cometary bombardment. It is a living archive of planetary and biological evolution, shaped more by time and internal processes than by external catastrophe.

Formation and place in the Galen Alpha System

Galentor formed approximately 3 billion years ago from the unusually massive and metal-enriched protoplanetary disc surrounding Galen Alpha. Despite the system’s remote location near the thinning edge of the Carina–Sagittarius Arm of the Milky Way Galaxy, the disc contained sufficient heavy elements to allow the formation of multiple rocky worlds.

Galentor accreted just beyond the inner volatile-loss zone, allowing it to retain substantial water and atmospheric gases while avoiding the intense early irradiation that stripped its inner neighbour, Pentaurus. Galentor is thus the second planet from Galen Alpha. From its earliest epochs, Galentor possessed shallow global oceans, a nitrogen-dominated atmosphere, and a magnetic field strong enough to protect its surface from stellar winds.

The planet’s low axial tilt, established early by the stabilising influence of its moon (covered elsewhere), prevented extreme seasonal cycles. Combined with Galen Alpha’s relatively subdued magnetic activity, this allowed Galentor’s climate to settle rapidly into a long-lived equilibrium.

Orbiting Galen Alpha at just under one astronomical unit, Galentor receives slightly more stellar energy than Earth does from Sol. Its parent star, Galen Alpha, is marginally more luminous than Earth’s Sun, yet Galentor’s modest orbital eccentricity keeps seasonal variations gentle rather than extreme. The world’s low axial tilt further moderates its climate, reducing harsh seasonal contrasts.

From the surface, Galen Alpha appears fractionally larger and brighter than Sol does from Earth. In the night sky, the volcanic moon Tarack dominates the heavens, a vast, slowly changing presence whose faint volcanic plumes can occasionally be detected as shimmering auroral distortions.

Galentor sits in a dynamically stable position within the system. The gas giants Volturn and Luradian shepherd the outer regions, preventing inward migration of debris and maintaining long-term orbital stability. The result is a mature, settled planetary environment some three billion years old.

Galentor’s orbit around Galen Alpha

Planetary Characteristics and Surface

Galentor is slightly lighter than Earth, with marginally lower surface gravity. Its diameter is similar to Earth’s, but its lower density reflects a somewhat smaller metallic core relative to mantle volume.

The surface is dominated by ocean. Approximately 74% of the planet is covered by interconnected oceans, leaving dispersed continents and archipelagos scattered across the globe. No single supercontinent exists. Instead, mid-sized landmasses and elongated island chains define the geography. 

Continental margins are complex and deeply indented, producing vast shallow seas and rich coastal ecosystems.  The coastal erosion occurring as a result increases environmental fertility by higher levels of mineral recycling into soils and shallow seas, leading to greater biodiversity.

This fragmented geography also promotes biodiversity by encouraging regional specialisation while maintaining global ecological connectivity.

Polar regions are largely oceanic. Permanent ice is rare and confined to isolated high mountain ranges. The planet’s warm equilibrium temperature and equable climate prevent large-scale glaciation.

Unlike many habitable planets, Galentor has avoided major global resets. There is no evidence of planet-wide glaciations or runaway greenhouse phases. Instead, the geological record shows a slow oscillation between warmer and cooler eras, with the present climate resembling Earth’s Eocene period: warm, humid, and biologically exuberant.

Atmosphere

Galentor’s atmosphere is breathable for humans without assistance, though slightly more humid on average than Earth’s. Nitrogen and oxygen dominate, with trace gases including argon and carbon dioxide. Water vapour plays an important climatic role, supporting a vigorous hydrological cycle.

The dense covering of most of the land masses with forests has produced an atmosphere with slightly higher levels of oxygen than is typical of Earth’s, and slightly lower levels of carbon dioxide, as more CO2 is fixed into the plant-like part of the biomass. This means the temperature is slightly lower than it would be if the atmosphere had the same composition as Earth’s.

Surface pressure is slightly higher than that of Earth at sea level, and the lower gravity makes movement feel subtly lighter without being disorienting. To humans arriving on Galentor, the atmosphere seems “deep” and invigorating, and over the decades, the settlers have adapted to it.

The sky is a deep blue under clear conditions. Cloud systems are prominent and dynamic, particularly over warm equatorial oceans. Storm systems are frequent but rarely catastrophic at continental scale.

Oceans

The oceans are the defining feature of Galentor. They are warm, extensive, and biologically productive. Continental shelves are broad, and shallow seas teem with life. Coral-analog reef systems flourish in tropical belts, forming labyrinthine archipelagos.

Deep ocean basins exist between continents, but the absence of polar ice caps ensures continuous circulation between equator and pole. Warm currents distribute heat efficiently, contributing to the planet’s globally mild climate.

Bioluminescent plankton blooms are common in certain regions, producing spectacular nocturnal displays visible even from orbit.

Tides on Galentor are higher than Earth’s, due to the closer proximity of its Moon. This leads to complex and rich intertidal zones, increasing biodiversity and leading to highly fertile deltas and estuary systems.

Two Dalek battleships in high orbit around Galentor, with a view of Tarack

Climate and Weather

Galentor’s climate can best be described as similar to that of Earth during its hottest period, the Eocene. It is warm, humid, and relatively equable. Average global temperatures are higher than pre-industrial Earth.

Seasonal shifts are mild due to low obliquity. Tropical and subtropical conditions extend well into higher latitudes. Polar regions experience cool temperate conditions rather than true polar cold.

The rotation period generates active atmospheric circulation. Mid-latitude cyclonic systems form regularly over ocean basins. Equatorial storm belts are persistent but stable. Hurricanes occur, but the planet’s high ocean coverage tends to dissipate their energy before they make prolonged landfall.

Lightning activity is frequent over warm seas. Auroral displays are common at high latitudes, occasionally enhanced by interactions between Galentor’s magnetosphere and volcanic ejecta from Tarack.

Geological and Tectonic Activity

Galentor is geologically alive. Plate tectonics are active, driven by internal heat from a still-warm mantle and moderate radiogenic decay, especially given Galentor’s younger age than Earth’s. Subduction zones ring several ocean basins. Volcanic island arcs dot tectonic boundaries, while high mountain chains rise where continental plates collide.

Seismic activity is frequent and persistent but generally moderate. The planet’s lower gravity produces slightly broader mountain profiles than Earth’s, with expansive plateaus and sweeping volcanic shields.  The regular activity sustains long-term carbon cycling. 

Hydrothermal vents in deep ocean trenches support complex chemosynthetic ecosystems.

The presence of plate tectonics contributes to long-term carbon cycling, stabilising atmospheric carbon dioxide and helping maintain climatic balance.

Biodiversity and Native Life

Galentor’s biosphere is ancient, rich and diverse. Life emerged early and diversified rapidly. There is no evidence of a single dominant extinction event or a succession of them as on Earth. Instead, evolutionary change has been gradual, layered, and cumulative.  Galentor's biosphere has been measured to be more productive and fertile than Earth's was at any point in its history.

Photosynthetic life dominates coastal shallows and inland wetlands. Vast marine ecosystems form the backbone of planetary productivity. Oxygen levels are high enough to support large, complex multicellular organisms.

Galentor’s plant analogues include vast forests of tall, branching organisms reminiscent of terrestrial trees, along with extensive fungal networks that permeate soils, coastlines, and shallow seabeds. These fungi-like life forms play a central role in nutrient cycling and symbiotic relationships.

On land, life has radiated into a variety of ecological niches. Forest-analogs extend into higher latitudes. Many terrestrial organisms exhibit lightweight skeletal structures, adapted to the planet’s slightly lower gravity.

Marine megafauna are particularly abundant. Some are even larger in scale than Earth’s great whales (all extinct by the 42nd century), though taxonomically unrelated. Marine ecosystems teem with complex organisms, including large, semi-intelligent predators and filter-feeders.  

Predatory aerial organisms thrive in the humid atmosphere, taking advantage of buoyant air and thermal currents.  Mammal-analogues roam the wide forests, including ferocious semi-bipedal carnivores. 

Palaentologists are puzzled by certain fossil finds that suggest intelligent animals may have arisen at several points in Galentor’s past, although no conclusions have been reached.  It is not thought that any intelligent Galentorian life forms were ever technological or industrial.

The long and undisturbed evolution of life on Galentor has led to rich and complex relationships developing at all levels, including phyla, kingdom and domain. These relationships include the parasitic, symbiotic and even altruistic. The Lentargi Field (see below) is believed to play a role in this highly interconnected biosphere. 

The Lentargi Field

Perhaps Galentor’s most mysterious feature is the Lentargi Field, a faint but measurable bioelectromagnetic phenomenon associated with certain living tissues, particularly advanced fungal networks, at deep ocean hydrothermal vents and neural structures of vertebrates.

The Lentargi Field is not a force in the conventional physical sense, nor does it violate known physics. Instead, it appears to be an emergent property of complex, interconnected biological systems operating at planetary scale. The field fluctuates subtly with ecological cycles, population density, and even planetary magnetic variations. Some introduced Earth species exhibit unusual adaptive responses when exposed to the Lentargi Field.

While its effects are weak, sensitive instrumentation suggests it may facilitate long-range biochemical signalling, enhance neural coherence, or subtly influence evolutionary pathways. Some Federation scientists speculate that the Lentargi Field may explain Galentor’s unusual ecological stability and resilience.

Others, such as Xafonix, believe it represents an early-stage planetary noosphere, a transitional phenomenon between purely biological life and something more profound. Federation xenobiologists have mapped correlations between Lentargi Field fluctuations and biological synchronisation events, but the underlying mechanism remains elusive and controversial. No consensus exists, and this unique field remains an active subject of debate and quiet fascination.

A World Apart

Galentor’s defining characteristic is not merely its habitability, but its continuity. Sheltered by distance and circumstance, it has evolved without the frequent cosmic interruptions that shape most life-bearing worlds. Its skies are dark at night, its star fields sparse, and its cosmic environment quiet.

To travellers arriving from crowded regions of the Galaxy, Galentor feels timeless. It is a world that has been allowed to become itself.

As Xafonix, Federation ecologist and biophysicist, famously remarked:

“Galentor is not just alive. It has been left alone long enough to understand what life wishes to be.”

Galentor seen from space

Pentaurus - Galen Alpha b - a planet in the Galen Alpha system

This is a write up of Pentaurus, a planet in the Galen Alpha planetary system, the setting for the Tyranny of the Daleks scenario, using the Second Edition of the Doctor Who Roleplaying Game from Cubicle 7.

Pentaurus, Galen Alpha b

Pentarus, first planet in orbit around Galen Alpha (the Athyric Rift is clearly visible in this photo)

Mass : 0.55 x Earth

Diameter: 10,242 kilometres

Density: 5.84 grams per cubic centimetre

Average temperature: 99.1 degrees Celsius (372 Kelvin) (minimum 1.64 degrees Celsius, maximum 123 degrees Celsius)

Rotational Period: 0.321 days

Orbital Period: 97.6 days

Surface gravity : 0.852 g

Semi-Major Axis of orbit : 0.42 AU

Eccentricity of orbit : 0.0139

Inclination of orbit: 1.10 degrees

Obliquity : 13.8 degrees

Pentaurus is the innermost planet of the Galen Alpha system, a scorched but enduring rocky world whose surface tells a story of lost oceans, planetary stress, and long, slow desiccation. Seen from orbit, Pentaurus presents a striking ochre and rust coloured globe, scarred by vast tectonic ruptures and mineral plains that glow faintly under the light of its parent star.

Appearance from Orbit

From space, Pentaurus is immediately recognisable by a colossal, planet spanning fracture zone that arcs across much of the visible hemisphere. This immense scar, kilometres deep in places, is believed to be the remnant of early global tectonic failure, possibly triggered by rapid internal cooling combined with tidal stresses during the system’s formative era. The fracture is not a single canyon, but a complex network of collapsed crust, rift valleys, and exposed mantle rock.

Surrounding this great rift are wide expanses of smoother terrain, coloured pale tan to deep ochre. These regions are interpreted as ancient seabeds and evaporite plains, where long vanished oceans once deposited thick layers of salts and fine sediments before retreating completely.

Scattered darker regions mark areas of denser basaltic crust or volcanic resurfacing, while lighter patches are consistent with salt flats and mineral precipitates, highly reflective and chemically altered by long exposure to stellar radiation.

Geological Character

Pentaurus is a dense, metal rich terrestrial planet, and its surface reflects a world that has endured enormous internal stress. Although large-scale volcanism has long since declined, geothermal activity remains present in isolated regions, particularly along tectonic boundaries and within deep canyon systems. Here, heat from the mantle still finds pathways to the surface, creating fumaroles, mineral vents, and occasional thermal outbursts.

The great fracture system visible from orbit still experiences minor seismic activity. These slow crustal movements periodically expose fresh rock faces and release trapped gases, contributing to the thin, chemically harsh atmosphere.

Climate and Environment

Pentaurus is hot, dry, and unforgiving. Its proximity to Galen Alpha results in strong solar heating, while its rapid rotation prevents extreme temperature locking between hemispheres. The planet experiences short, intense days and nights, producing strong thermal winds that carry fine mineral dust across the surface.

There is no stable surface water. However, mineral salts and hydrated compounds remain widespread, offering clear evidence of a wetter past. In low lying basins, transient brine films may briefly form under favourable conditions, evaporating quickly and leaving behind fresh crystalline deposits.

The atmosphere is thin and dominated by heavy gases, incapable of sustaining complex life on the surface. Nevertheless, the planet remains of great interest to scientists, as its crust preserves a remarkably clear record of planetary desiccation.

The Athyric Rift (also known as the Athyric Chasm Complex)

The vast canyon network visible across much of Pentaurus’s surface is known collectively as the Athyric Rift. Spanning nearly a quarter of the planet’s circumference, it is one of the largest continuous tectonic fracture systems known in the Galen Alpha system.

Origin and Formation

The Athyric Rift is believed to have formed during Pentaurus’s early cooling phase, when the planet’s dense metallic core contracted faster than its brittle outer crust. This contraction, combined with tidal stresses from Galen Alpha and the formative impact that created Calyx, caused the lithosphere to fail catastrophically along a global fault line.

Rather than forming a single canyon, the failure propagated laterally, producing a braided system of chasms, collapsed plateaus, and exposed mantle shelves. Some sections exceed 12 kilometres in depth, with stepped walls revealing clearly stratified mineral layers from Pentaurus’s oceanic era.

Physical Characteristics

The rift varies dramatically along its length:

• Primary chasm zones form sheer walled trenches hundreds of kilometres wide.
• Fracture fields consist of shattered crust, tilted slabs, and collapsed basins.
• Salt exposed terraces line many interior walls, glowing pale white or pink in orbital imagery.
• Dark thermal scars mark regions where mantle heat still rises close to the surface.
• In several locations, the canyon floor drops below what would once have been Pentaurus’s global sea level, strongly supporting the theory that ancient oceans drained into the Athyric Rift during the planet’s final desiccation phase.

Geothermal Activity

The Athyric Rift remains the most geologically active region on Pentaurus.

Isolated geothermal vents, mineral geysers, and superheated fumaroles dot the canyon floor and lower walls. These vents release sulphur compounds, metal vapours, and trace gases, creating shimmering heat plumes visible from orbit during favourable lighting.

Several of these regions are considered potential refugia for extremophile microbial life, sheltered from radiation and temperature extremes within mineral rich caverns.

Scientific and Exploratory Significance

For offworld researchers, the Athyric Rift is often described as a planetary autopsy laid bare. Its exposed layers provide a continuous geological record spanning more than two billion years. Ancient evaporite deposits preserve chemical signatures of Pentaurus’s lost oceans.

Seismic sensors placed along the rift detect slow, rhythmic crustal adjustments, suggesting the planet is still settling into long term equilibrium. The Rift’s complexity also makes it notoriously dangerous. Sudden rockfalls, ground collapse, and unpredictable thermal releases have claimed several AI probes.

Cultural and Narrative Notes

Among early Galen explorers, the Athyric Rift earned a grim reputation. Survey crews referred to it as “the planet’s open wound”, a phrase that later entered common astrogeological literature.

In some speculative xenohistorical theories, the Rift is believed to have influenced early life evolution on Pentaurus, acting as a final refuge zone as surface conditions deteriorated.

Secondary and Colloquial Names

Different traditions and organisations use alternate names for parts of the system:

The Worldscar – used by early deep space navigators.

The Ochre Divide – a poetic name referencing its colour contrast.

The Saltfall Trenches – used for regions rich in exposed evaporites.

The Calyx Line – a nickname among astronomers linking the rift’s origin to the moon forming impact.

A World of Narrative Significance

Pentaurus is not a dead world but a quietly active one. Its immense rift systems, salt deserts, and geothermal pockets make it an ideal setting for lost research stations, hidden subterranean installations, or ancient experiments abandoned when the planet’s habitability collapsed.

In the context of the Galen system, Pentaurus serves as a cautionary counterpoint to Galentor. Where Galentor flourished, Pentaurus endured. Its surface stands as a planetary fossil, preserving the moment when a world slipped just too close to its star and paid the price.

For travellers, Pentaurus is a place of stark beauty and deep time, a planet that invites exploration not for what lives there now, but for what once did, and what secrets still lie buried beneath its fractured crust.

Calyx

Calyx, the moon of Pentaurus

Mass : 0.0066 x Earth ( 0.536 x Moon )

Diameter: 3,318 kilometres

Density: 2.06 grams per cubic centimetre

Average temperature: 164 degrees Celsius (437 Kelvin) (minimum 136 degrees Celsius, maximum 167 degrees Celsius)

Rotational Period: 5.88 days

Orbital Period: 2.68 days

Surface gravity : 0.0975 g

Semi-Major Axis of orbit : 60,318 kilometres

Eccentricity of orbit : 0.0139

Inclination of orbit: 1.10 degrees

Obliquity : 151 degrees

Pentaurus is orbited by a single natural satellite, Calyx, a small but geologically distinctive moon that plays a subtle role in the planet’s long-term evolution.

Calyx is thought to have formed from debris generated by a major early impact on Pentaurus, an event that likely contributed to both the planet’s rapid loss of volatiles and the initiation of large-scale crustal fracturing that culminated in the Athyric Rift. Its composition supports this origin: Calyx is relatively low in density, with a mixed silicate and volatile-poor mantle, suggesting it accreted from already differentiated planetary material rather than forming independently.

The moon orbits unusually close to Pentaurus, completing a revolution in less than three days. Despite this proximity, its orbit is remarkably regular, with only a slight eccentricity and a low inclination relative to Pentaurus’s equatorial plane. Tidal interactions have long since locked Calyx into synchronous rotation, though its axial orientation is extreme. With an obliquity exceeding 150 degrees, Calyx effectively rotates in a retrograde, upside-down configuration, likely the lasting consequence of chaotic angular momentum transfer during its formation.

Calyx is intensely heated. Its surface temperatures are high even by inner-system standards, driven primarily by tidal stress and residual radiogenic heat rather than direct stellar illumination alone. While it lacks the violent volcanism seen on moons like Tarack elsewhere in the Galen system, Calyx exhibits widespread crustal deformation, extensive fracture fields, and regions of softened, partially molten rock beneath a brittle outer shell. Localised lava effusions and sulphur-rich deposits have been detected along major fault zones, particularly on the hemisphere facing Pentaurus.

The surface itself is pale, scorched, and uneven, marked by smooth plains of reworked impact material interspersed with uplifted ridges and collapsed basins. Few large craters remain intact, as surface renewal processes have erased much of the moon’s early bombardment record.

From Pentaurus’s surface, Calyx appears large and unsettlingly close, moving rapidly across the sky. Its pale, heat-blanched face reflects sunlight weakly, but during certain alignments it can be seen glowing faintly in the infrared, a visible reminder of the immense energies still at work within the inner Galen Alpha system.

Though Calyx is far too hostile to support life, it remains a world of great scientific interest. Its interior retains a thermal memory of Pentaurus’s violent youth, and continued study of the moon has yielded valuable insight into early planetary differentiation, tidal evolution, and the destabilising effects of close-orbit satellites in young stellar systems.

Calyx's orbit around Pentaurus

The Galen Alpha Planetary System

This is a write up of the Galen Alpha planetary system, the setting for the Tyranny of the Daleks scenario, using the Second Edition of the Doctor Who Roleplaying Game from Cubicle 7.

The Galen Alpha System

Overview

The Galen Alpha system is a rare and remarkable planetary arrangement found at the extreme fringe of the Milky Way. Orbiting a young, luminous G-type star in near-total isolation, the system has evolved with minimal external disturbance for over three billion years. Its architecture reflects both long-term stability and traces of ancient dynamical upheaval, shaped in part by the distant presence of its companion star, Galen Beta. At its heart lies Galentor, a fertile garden world whose biosphere has given rise to the enigmatic Lentargi field.

(References in what follows to an AU are to the Astronomical Unit, that is the distance from the Earth to the Sun, which is approximately 150 million kilometres, or 93 million miles.)

A view of the outer reaches of the Galen Alpha planetary system

The Star

Galen Alpha is a G1V main-sequence star with a mass of 1.04 times that of Sol and a luminosity 1.18 times greater. At an age of approximately 3.07 billion years, it is younger and slightly more energetic than Earth’s Sun, emitting a steady gold-white light with relatively subdued magnetic activity.

Its rotation period of 24 days and modest starspot cycle contribute to a calm stellar environment. Combined with the system’s isolation, this has allowed Galen Alpha’s planets to evolve without frequent radiation storms, nearby supernovae, or gravitational disruption. Galen Alpha is orbited at a vast distance of 0.542 light years by its faint companion, Galen Beta, forming one of the widest known stable binary systems.

Inner Dust Ring

A dust ring encircles Galen Alpha between approximately 0.15 and 0.28 AU, composed of hot silicates, carbon-rich grains and scattered metallic fragments.  This is the remnant of a population of early superheated planetesimals that failed to accrete.  

The Planets

The Galen Alpha system contains six major planets, arranged in a broadly classical architecture of inner terrestrials and outer gas giants, though with several distinctive features.

Pentaurus (Galen Alpha b)

A small, rocky inner world orbiting at 0.421 AU. Once partially oceanic, Pentaurus lost most of its volatiles early in the system’s history. It is now a dry, ochre-coloured planet marked by salt flats, deep canyon systems, and scattered geothermal regions.  This planet has one moon, Calyx, which probably originated from impact debris.

Galentor (Galen Alpha c)

The system’s primary life-bearing world, orbiting at 0.969 AU, mostly blue and shining from the oceans to be found on its surface. Galentor is a warm, stable garden planet with low axial tilt and shallow seasonal variation. Roughly three quarters of its surface is ocean, with small, widely distributed continents. Its biosphere is rich and extraordinarily interdependent, supporting forests, oceans, and complex life, including mammalian analogues. The Lentargi field is a planetary-scale bioelectromagnetic phenomenon emerging from this biosphere.

Galentor is orbited by Tarack, an Io-like volcanic moon whose intense activity is driven by tidal interactions within the system.

Karvtal (Galen Alpha d)

A cool, stormy terrestrial world at 1.34 AU. Karvtal is slightly larger than Earth, though less massive due to a lower density, with extensive cloud belts, glaciated regions, and active plate tectonics. Liquid water persists underneath the ice in equatorial, subterranean lakes, and microbial or primitive multicellular life is considered plausible. Karvtal possesses a single satellite, Velnara.

The Cyndor Belt (Inner Asteroid Belt)

The innermost of the Galen Alpha system’s two asteroid belts, this is found between 1.8 and 2.6 AU and is a wide, low-density asteroid region.  It is sparser than the asteroid belt in Earth’s Solar system, and has a low metallicity. 

Thandor (Galen Alpha e)

A cold super-Earth at 3.09 AU, with a mass 3.8 times that of Earth’s. Thandor is transitional between a massive terrestrial planet and a mini-Neptune. A thick ice shell overlies deep subsurface oceans, and a hydrogen-rich atmosphere blankets the surface. Its high obliquity drives extreme seasonal cycles. Thandor, uniquely in the Galen Alpha system, does not have a natural satellite.

Volturn (Galen Alpha f)

The inner gas giant, orbiting at 6.51 AU, and smaller and less massive than Jupiter. Volturn is a pale, mostly copper-coloured, storm-banded giant with a relatively low density and a rapid rotation period. Its early formation acted as a gravitational stabiliser, preventing inward planetary migration and contributing significantly to the long-term order of the system.

Volturn has a faint, pale ring system around it, and nine major moons, along with two small shepherd moons for the rings. It also has 43 inner moonlets, which are really piles of rubble between 1 and 50 kilometres across, and up to 400,000 kilometres distant in their orbit from Volturn.  Finally, there are 59 small moons of between 2 and 80 kilometres across at high inclinations and eccentricities with orbits beyond 1 million kilometres from Volturn, all of which are again little more than piles of rubble bound together with a loose covering of regolith.

Luradian (Galen Alpha g)

The outer gas giant, orbiting at 11.4 AU, slightly longer than the orbit of Saturn around Sol. Larger but less dense than Volturn (and indeed Jupiter), Luradian possesses an extensive and spectacular axial ring system, tilted at 52 degrees, and a dynamically complex moon family, including captured objects and active icy moons. Luradian is subtly coloured, with cyan and pink banding of clouds across its surface. 

Luradian has eleven major moons.  Two of the major moons act as shepherd moons for the ring system, along with seven moonlets embedded in the densest part of the ring, which create wakes and transient spokes during magnetospheric storms.  In addition, a captured icy dwarf planet orbits Luradian at the leading L4 point about Luradian.  Finally there are 58 small irregular moonlets in high inclinations and eccentricities beyond the orbit of the furthest major moon, Vaelor.  These moonlets are from 1 to 40 kilometres across, essentially piles of rubble bound by a loose and thin covering of regolith.  

The Outer Halin Belt

The outermost of the system’s two asteroid belts, this lies between 14 and 22 AU and is a thin, widely spaced belt of icy remains.  It was sculpted by early interactions between Galen Alpha and Beta before the latter was flung far out to 0.542 light years.

Far Objects Zone

Between 30 to 80 AU from Galen Alpha, this sparse and widely spaced zone includes a number of dwarf planets, extremely scattered objects and dormant comet nuclei.  It has a very low density but is deeply ancient compared to the rest of the system.  One body, provisionally named Xyr, displays anomalous spectral lines possibly related to the Lentargi field.

Interactions with the Galen Beta System and Interstellar Space

Galen Beta’s distant orbit has had no significant effect on the stability of Galen Alpha’s planets in the present era. However, early interactions likely shaped the outer debris structures and cleared much of the primordial material beyond the gas giants.

The system’s position at the edge of the galactic disk places it in an exceptionally sparse stellar environment. With no nearby stars, nebulae, or supernova remnants, Galen Alpha has evolved in near isolation. This cosmic quiet has preserved its planetary architecture and allowed Galentor’s biosphere to flourish uninterrupted for billions of years.

To Federation astronomers, the Galen Alpha system stands as a rare natural laboratory. A complete, life-bearing planetary system formed and matured at the very edge of the Galaxy, far from the turbulence of its crowded heart.

The inner Galen Alpha planetary system