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2 votes
1 answer
119 views

Is an earth-sized moon orbiting a super-earth feasible?

Is an earth-sized moon orbiting a super-earth feasible? Or would tidal forces say 'no thanks'? I'm making a system for the Kerbal Space Program Kopernicus mod and am trying to make it as realistic as ...
spaceman0x2A's user avatar
2 votes
0 answers
81 views

Are stagnant-lid Earth analogues guaranteed to become Venus-like?

In our current understanding of Venus, two things are generally accepted: Venus reached its thermal tipping point at least 700 Ma. As the Sun's luminosity gradually increased with age, its average ...
Thoth's user avatar
  • 181
14 votes
3 answers
5k views

Are there any planets or moons denser than Earth?

Earth has the highest density out of all planets, planetoids and moons of our planetary system, and also has a higher density than the Sun. Do we know any exoplanets or moons denser than Earth?
user30007's user avatar
  • 1,236