Planets: Difference between revisions
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|''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.'' | |''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.'' | ||
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|[[File:Gas giant with ammonia based life.png|thumb|center]] | |[[File:Gas giant with ammonia-based life Wredguia EP-K b37-0 3.png|thumb|center]] | ||
|Gas giant with ammonia-based life | |Gas giant with ammonia-based life | ||
|Very Rare | |Very Rare | ||