Codex > Newton%27s Vault > Astronomical Bodies > Gas Giants Planets > Class II gas giant planet
Standard Gas Giant
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![](https://static.edsm.net/img/codex/12091.png?v=1547325316)
Green Gas Giant
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![](https://static.edsm.net/img/codex/12092.png?v=1548664048)
A gas giant with a primarily hydrogen and helium atmosphere. Water vapour in the upper cloud layers gives a much higher albedo. Surface temperatures are typically around 250 K. Vivid cloud layer colouration suggests bioluminescent organisms. There are vast quantities of free-floating radioplankton – tiny carbon-based algae.