Planets: Difference between revisions
No edit summary |
No edit summary |
||
| Line 49: | Line 49: | ||
|- | |- | ||
| rowspan="2"|[[File:Water.jpg|thumb]] | | rowspan="2"|[[File:Water.jpg|thumb]] | ||
|Water World | |[[Water World]] | ||
|Rare | |Rare | ||
|- | |- | ||
| Line 105: | Line 105: | ||
| rowspan="2"|[[File:Helium-rich Gas Giant.png|thumb]] | | rowspan="2"|[[File:Helium-rich Gas Giant.png|thumb]] | ||
|Helium Gas Giant | |Helium Gas Giant | ||
| | |Very Rare | ||
|- | |- | ||
| colspan="2"|''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.'' | | colspan="2"|''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.'' | ||