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

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CGP Grey said that Brown Dwarf Stars "blur the line" between what a planet is, and a star. What exactly differentiates a cool Brown Dwarf from a Gas Giant?

374 upvotes

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Would a signal sent to a possible life bearing planet many light years away even be recognizable as the original message once it reaches its destination?

201 upvotes

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How big does a body of water need to be to experience noticeable tidal action?

3 upvotes

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Are neutron stars transparent? Since neutrons are neutrally charged, they shouldn't interact with protons, thus making neutron stars transparent, visibly. Or am I totally incorrect?

2 upvotes

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If oxygen bottles were rigged to provide an engine with air through the intake, would it be possible to drive a vehicle with an internal combustion engine on the moon?

2 upvotes

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If I could scoop a cup of material out of a black hole, what would it look like?

2 upvotes

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Could my car run on the moon? Assuming I had a compressed oxygen system feeding the engine, could I drive on the moon?

1 upvotes

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Is there a global population number for modern societies that is sustainable, and would, in theory, use resources at the same rate that they are naturally replenished?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
CGP Grey said that Brown Dwarf Stars "blur the line" between what a planet is, and a star. What exactly differentiates a cool Brown Dwarf from a Gas Giant?	374
Would a signal sent to a possible life bearing planet many light years away even be recognizable as the original message once it reaches its destination?	201
How big does a body of water need to be to experience noticeable tidal action?	3
Are neutron stars transparent? Since neutrons are neutrally charged, they shouldn't interact with protons, thus making neutron stars transparent, visibly. Or am I totally incorrect?	2
If oxygen bottles were rigged to provide an engine with air through the intake, would it be possible to drive a vehicle with an internal combustion engine on the moon?	2
If I could scoop a cup of material out of a black hole, what would it look like?	2
Could my car run on the moon? Assuming I had a compressed oxygen system feeding the engine, could I drive on the moon?	1
Is there a global population number for modern societies that is sustainable, and would, in theory, use resources at the same rate that they are naturally replenished?	1