Venus (SR 1827) (world)

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Venus/Sol (Solomani Rim 1827)
Classic Era (1115)
StarportG Error in Starport Decode
Size8 Large (12,800 km, 0.80g - 1.08g)
AtmosphereB Exotic (corrosive)
Hydrographics0 Desert World 0%
Population1 Low (10)
Government6 Captive Government/Colony
Law8 High Law (controlled blades)
Tech LevelE High Stellar (anti-grav cities)
See also UWP
System Details
Primary G2 V
Planetoid Belts 1
Gas Giants 4

Venus (SR 1827) is a low-population hellworld with a population less than 10,000 sophonts struggling to survive in an inhospitable environment .

Description / Astrography & Planetology[edit]

Venus is an insidious atmosphere inferno world lying in the H– region of the Terra system, in Sol Subsector of the Solomani Rim.

Monostellar System[edit]

Venus Monostellar System
Star Name Hierarchy Category Mass (Sol) Temp (K) Luminosity (Sol)

G2 V

Primary Main Sequence 1 5100 - 5900 1
Unit Diameter Min Distance Hab Zone Jump Shadow M-Drive Limit
AU 0.0093 0.08294 0.8 - 1.3 0.93 9.3
Orbit #  *  * 3 3 7

System Data[edit]

The primary of the Terra system is Sol, an ordinary yellow main sequence star. It has a luminosity of 1 Sol, a mass of 1 Sol, and a diameter of 1.391 million km. Sol retains a family of four inner rocky worlds, a stony planetoid belt, four outer gas giant worlds, and an outer ring of icy worldlets and debris:

  1. Mercury
  2. Venus
  3. Terra / Luna
  4. Mars
  5. Asteroid Belt
  6. Jupiter
  7. Saturn
  8. Uranus
  9. Neptune
  10. Pluto / Kuiper Belt
  • Venus is the second of the four inner rocky worlds.
  • Venus orbits Sol at a distance of 77.6 Solar diameters, within the star's 100 diameter safe jump limit.


Venus is categorised as an inferno world. It orbits Sol at a mean distance of 0.72 AU (108 million km), within the H– region of the inner system. It has an orbital period of 224 days 16 hours, and a clockwise (retrograde) rotational period of 243 days, which when combined produce a local "day" of 116 days 18 hours from the perspective of one standing on the surface. The axial tilt is 177.4 degrees. Venus has a diameter of 12,104 km, a density of 5.24 g/cm³, and a surface gravity of 0.9 G. It is geologically active. Its atmosphere is rated as Corrosive, with a mean surface pressure of 92.1 bar and a composition of 96.5% carbon dioxide (CO2), 3.5% nitrogen (N2), and trace amounts of sulfur dioxide (SO2), argon (Ar), water vapor (H2O), carbon monoxide (CO), helium (He) and neon (Ne). The world has no hydrosphere. Mean surface temperature: 467°C. The atmosphere is active and strong weather systems driven by convection flow within its upper levels. The climate is static.

Internal Structure[edit]

Venus has an extremely hot metallic iron core with a diameter of approximately 6,000 km. Above this is a hot mantle roughly 3,000 km thick that exhibits fluidic properties. The crust is largely composed of basaltic rock with an average thickness of between 10 and 20 km. The world does not generate a significant magnetic field.

Atmospheric Structure[edit]

The troposphere is the lowest layer of the atmosphere and experiences pressures ranging from 92.1 bar at the surface to 1 bar at an altitude of 50km. Below 10 km the air is gloomy and murky, with red-tinted hazes composed of fine dust and mists of evaporated surface sulfur (S). At altitudes of between 10 and 30 km the atmosphere is relatively transparent, though it contains significant quantities of sulfuric acid particles (H2SO4). At altitudes of between 30 and 50 km the air is filled with a dense haze composed of airborne dust and very fine droplets of sulfuric acid, the result of evaporating sulfuric acid rain falling from the stratospheric cloud decks.

Above the troposphere is the stratosphere, with pressures ranging from 1 bar at an altitude of 50 km to around 0.05 bar at an altitude of 80 km. Within its lower levels it is dominated by thick cloud layers composed of sulfuric acid droplets. The highest cloud tops reach altitudes of almost 60 km. At higher levels the stratosphere contains airborne particles of sulfur, which serve to give the otherwise transparent gas mixture a distinct yellowish hue.

  • Sulfuric acid condenses within the lower stratosphere (at around an altitude of around 50 km) and falls as rain. It evaporates back into sulfuric acid vapor as the atmospheric temperature increases, having entirely evaporated by an altitude of around 30 km. The vapor is eventually carried back into the clouds.

Above the stratosphere is the mesosphere. Its lowest regions, beginning at an altitude of around 80 km, have a pressure of around 0.05 bar. The mesosphere extends to beyond 1,000 km and at its outer edge, where pressures are near vacuum, atmospheric gases bleed into interstellar space. Wispy clouds made up of tiny ice crystals can be found very at high-levels.


Venus experiences global circulation caused by temperature differentials, with rising currents of gases at the equator and falling currents of gases at the poles. Within the stratosphere winds with speeds of around 360 kph keep the clouds in constant motion. Wind speeds decrease at lower levels, with surface winds rarely exceeding tens of kph.

  • The atmospheric pressure at the surface is intense – it is equivalent to the pressure of the ocean on Terra at a depth of 1 km. It will rapidly crush and implode all but the strongest of devices and structures.

Temperatures on the surface average a scorching 467°C. They fall with altitude, averaging around 20°C within the tropopause, the troposphere's upper zone. They continue to fall to as low as -150°C within the upper stratosphere. Temperatures increase within the mesosphere (rising to as high as -100°C as a result of stellar energy acting on the world) then fall again to match that of the local interstellar medium.

  • The temperature on the surface is above the melting points of lead, tin and zinc. It will rapidly destroy any unprotected devices.

Geography & Topography[edit]

Total surface area: 460 million km². Roughly two-thirds of the world's surface is covered by relatively flat, smooth plains (known as planitiae) strewn with rubble and boulders and dotted by thousands of volcanic caldera ranging from 1 to 240 kilometers in diameter. Some are active, and lava flows emerge from them and carve long, winding channels which can exceed 5,000 km in length. Six major mountainous regions make up the remaining third of the surface. Mount Maxwell, lying within the Maxwell Range, has a height of 11.3 km, making it the highest feature on the world.

Native Lifeforms[edit]

Venus does not have native life.

History & Background / Dossier[edit]

Venus is the second planet from the sun in the Terran system in Sol Subsector of the Solomani Rim.

  • Circa -2431 a terraforming satellite is in orbit around Venus.
  • In -1688 an expedition launched to explore a geological anomaly uncovered Ancient ruins.

Imperial High / Landed Nobility[edit]

Only the mainworld of a system possesses an officially appointed or landed Imperial Noble.

  • The landed nobles of this system are located at the mainworld on Terra.

World Starport[edit]

Venus (SR 1827) has a Class G Spaceport, poor quality secondary installation for handing expected in-system traffic. It can supply a only a few amenities. There is unrefined fuel available for purchase. There is no shipyard of any kind, but there may be parts and technical support for doing minor services and repair. Ports of this classification generally consist of only a downport.

World Technology Level[edit]

Venus (SR 1827) possesses a Technology Level of TL–14 or TL-E in Hexadecimal Notation.

  • Common Communication technologies for this TL include: Early meson communicators.
  • Common Power Generation technologies for this TL include: Miniature super-batteries, early collectors, and advanced fusion plants.
  • Common Transportation technologies for this TL include:

World Government[edit]

Venus (SR 1827) has a Captive Government or Colony. The world is ruled by an external government, there is no self-rule. A colony or conquered area. The local government is an oligarchy appointed by, and answerable only to, the external government.

World Military[edit]

No information yet available.

World Economy[edit]

No information yet available.

Trade Data[edit]

No information yet available.

World Demographics[edit]

Population 10.

World Culture[edit]

No information yet available.

Historical Data[edit]

No information yet available.

World Timeline[edit]

No information yet available.

UWP Listing[edit]

No information yet available.

Image Repository[edit]

TravellerMap (T5SS):

References & Contributors (Sources)[edit]

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