Planets: Difference between revisions

|[[Rocky Ice World]]

|''Typically formed in the cooler regions of a 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.''

|[[File:Rocky ice world Wredguia AG-F d11-24 A 7.png|thumb|center]]

|-

|[[Ammonia World]]

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

|[[File:Ammonia-World-180px.png|thumb|center]]

|-

|[[Water World]]

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

|[[File:Water.jpg|thumb|center]][[File:Water world Wredguia ZI-M b36-0 5.png|thumb|center]]

|-

|[[Earth-like world]]

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

|[[File:Earthlike.png|thumb|center]]

|}

|Class II gas giant

|''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.''

|[[File:Class II gas giant HIP 53248 AB 1.png|thumb|center]]

|-

|Class IV gas giant

|''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 the brighter colours. The temperature of their upper cloud layers is typically above 900 K.''

|[[File:Gas-Giant-Class-IV-180px.png|thumb|center]]

|-

|Class V gas giant

|''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.''

|[[File:Gas Giant Class V.png|thumb|center]]

|-

|''Helium gas giants have primarily a helium atmosphere. They have lost most or all of their hydrogen because they have insufficient mass to hold on to it over time. It may also be because temperatures in their past were much higher, driving off the hydrogen at a greater rate.''

|Extremely Rare

|[[File:Helium-rich Gas Giant.png|thumb|center]]

|-

|Gas giant with ammonia-based life

|''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 a small quantity of liquid ammonia, extracting their energy from the intense radiation flux.''

|[[File:Gas giant with ammonia-based life Wredguia EP-K b37-0 3.png|thumb|center]]

|-

|Gas giant with water-based life

|''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 a small quantity of liquid water, extracting their energy from the intense radiation flux.''

|[[File:Gas giant with water-based life Wredguia EP-K b37-0 4.png|thumb|center]]

|-

|Water Giant

|''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.''

|[[File:Water Giant.png|thumb|center]]

|}