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For questions related to outer space, stellar systems, stars and other astronomical phenomena.

7 votes

What's stopping me from inventing a planet with oceans of mercury?

You can achieve that with conditions that crack the hydrogen from the oxygen, allowing the hydrogen to dissipate to space via Jeans escape, or by making the surface a bit cold. …
MackTuesday's user avatar
2 votes

How would someone hide an asteroid in the void of space so only they could find it?

Location There are likely a vast multitude of rogue planets in interstellar space, enough that maybe no one's looking too hard at any single one: they are much farther apart than asteroids are, after …
MackTuesday's user avatar