Planets: Difference between revisions

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|Very Common, especially when orbiting cooler M class stars and brown dwarf stars including classes L, T, and Y.

|Ice world composed mainly of water ice. Worlds like this will not have had much heating in the past, forming in the cooler regions of a star system, and have retained many volatiles as solids within their crust.

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|Common

|Rocky world with little or no surface metal content. Worlds like this have lost most of their volatiles due to past heating, and any metallic content will form a small central core.

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|Uncommon

|Rocky ice world. Typically formed in the cooler regions of star system these worlds have a small metal core and thick rocky mantle with a crust of very deep ice. Geological activity is common in these worlds because of the large quantities of volatiles in the crust, often creating a thin, sometimes seasonal atmosphere.

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|Common (Rare if orbiting M, L, T, S class stars)

|High metal content world with a metallic core. Worlds like this can have metallic ores near the surface in places, especially around areas of past volcanism.

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This type of planetoid is always within close proximity of a star, often taking the form of a lava-covered planet or a potato planet.

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Said to be less common in the galactic core.

|Outdoor world with a human-breathable atmosphere and indigenous life. The atmosphere is far from chemical equilibrium as a result.

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|Very Rare

|Terrestrial ammonia world with an active ammonia-based chemistry and carbon-ammonia based life.

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Take caution when travelling near nonspherical bodies, as their small size can cause one to believe they are travelling further from the body's orbital cruise zone than they actually are and subsequently colliding at a significant velocity with the celestial body's glide engagement zone, triggering an emergency drop from supercruise and causing starship damage.

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Accounts for most Earth-Like Worlds in inhabited areas of space. Cannot be found in deep space

|Outdoor world with a human-breathable atmosphere and indigenous life. The atmosphere is far from chemical equilibrium as a result.

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! scope="col" |Rarity

! scope="col" |In game description

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Water Worlds may occasionally possess a small cluster of islands. This does not alter its classification, however.

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!Rarity 

!In game description

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|Uncommon

|Class I or Jovian gas giants have primarily hydrogen and helium atmospheres. Colouration comes from clouds in the upper atmosphere of ammonia, water vapour, hydrogen sulphide, phosphine and sulphur. The temperature at the top of their upper cloud layers is typically less than 150 K.

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|Rare

|Class II gas giants have primarily hydrogen and helium atmospheres. Water vapour in the upper cloud layers gives them a much higher albedo. Their surface temperature is typically up to or around 250 K.

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|Uncommon

|Class III gas giants have primarily hydrogen and helium atmospheres without distinctive cloud layers. Their surface temperature typically ranges between 350 K and 800 K. They are primarily blue in colour because of optical scattering in the atmosphere - with the chance of wispy cloud layers from sulphides and chlorides.

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|Very Uncommon

|Class IV gas giants have primarily hydrogen and helium atmospheres with carbon monoxide and upper clouds of alkali metals above lower cloud layers of silicates and iron compounds, hence he brighter colours. The temperature of their upper cloud layers is typically above 900 K.

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|Very Rare

|Class V gas giants have primarily hydrogen and helium atmospheres, with thick clouds of silicates and iron compounds, even metallic iron.They are the hottest type of gas giants with temperatures at their upper cloud decks above 1400 K, and much hotter in the lower layers, often emitting a dull glow from the internal heat within.

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|Very Rare

|Helium-rich gas giants have a greatly inflated percentage of helium compared to the hydrogen in their atmosphere. Much of their hydrogen has been lost over time because they have insufficient mass to hold on to it. It may also be because temperatures in their past were much higher, driving off the hydrogen at a greater rate.

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|Very Rare

|Gas giant with ammonia-based life. This is primarily a hydrogen and helium-based atmospheric gas giant, but a little below the surface cloud layers,life exists based in the ammonia-cloud layer. The chemistry of this gaseous region is far from equilibrium, with a surprising excess of oxygen and many carbon-based compounds giving it some vivid colours. As with many such gaseous living systems, it is underpinned by vast quantities of free-floating radioplankton - tiny carbon-based algae, each retaining small quantity of liquid ammonia, extracting their energy from the intense radiation flux.

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|Very Rare

|Gas giant with water-based life. This is primarily a hydrogen and helium based atmospheric gas giant, but not far below the surface exists life based in the water-cloud layer just below the atmospheric surface. The chemistry of this gaseous region is far from equilibrium, with a surprising excess of oxygen and many carbon-based compounds giving it some vivid colours. As with many such gaseous living systems, it is underpinned by vast quantities of free-floating radioplankton - tiny carbon-based algae, each retaining small quantity of liquid water, extracting their energy from the intense radiation flux.

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|Very Rare

|Water giant. Worlds like this have a large atmosphere made mainly of water vapour. It most likely formed when a large icy body warmed up enough to evaporate a large amount of its surface ice, this would in turn trigger a runaway greenhouse effect leading to a very thick atmosphere made of the evaporated ices.

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