/u/HimalayanFluke's posts in /r/askscience

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Are the orbital planes of most solar systems in the Milky Way coplanar with the galaxy? And is there any benefit in defining a galactic "up" and "down" convention?

536 upvotes

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Has abiogenesis ever occurred more than once on earth?

1 upvotes

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I heard that one of the biggest obstacles we would face in trying to terraform Mars is the tiny atmospheric pressure (0.6% of Earth's). Is it possible in theory, to change that?

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Suppose you're in an orbiting spaceship in microgravity. You throw a football lengthways down the ship while strapped to the floor. What happens to the speed of the spacecraft?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Are the orbital planes of most solar systems in the Milky Way coplanar with the galaxy? And is there any benefit in defining a galactic "up" and "down" convention?	536
Has abiogenesis ever occurred more than once on earth?	1
I heard that one of the biggest obstacles we would face in trying to terraform Mars is the tiny atmospheric pressure (0.6% of Earth's). Is it possible in theory, to change that?	1
Suppose you're in an orbiting spaceship in microgravity. You throw a football lengthways down the ship while strapped to the floor. What happens to the speed of the spacecraft?	1