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Celestial body that orbits following an elliptical path around a star or stellar remnant.

1 vote
1 answer
2k views

Is it possible that Earth started as a gas giant?

I read somewhere that most of the hot rocky planets could have started as hot Neptunes, but their stars blew their thick atmospheres away, leaving only the core. … Considering that all the inner planets in our solar system are rocky and all the outer planets are gas giants planets, it would make sense if the inner planets started as gas giants planets as well. …
inf3rno's user avatar
  • 1,079
1 vote
1 answer
277 views

How have the duration of the martian day changed in the past?

There is a panspermia theory which claims that life might have begun on Mars and I currently read a post that the human circadian rhythm is closer to the martian day length (about 25h) than the day le …
inf3rno's user avatar
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