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

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How do fusion scientists expect to produce enough Tritium to sustain D-T fusion (see text)?

836 upvotes

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Are there flying arthropods that aren't insects?

83 upvotes

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in the FAQ it is stated that one proof of the universe's expansion is that "more distant galaxies are packed closer together". What sort of measurements have been made to show this?

68 upvotes

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How long would it take a black hole of Jupiter's mass (and spin, charge, etc. if relevant) to evaporate due to Hawking radiation?

1 upvotes

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Why is faster than light travel said to violate causality?

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A great deal of effort has gone into studying the big bang, the beginning of our universe. To me, it seems the other extreme, the end of the universe, or heat death, has been much less well studied. Why is this?

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How much helium-3 is present in Saturn's atmosphere?

1 upvotes

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When emptying plastic ice trays, why do some cubes come out clean and perfect and some come out all frazzled and broken around the edges, even though the trays were seemingly cooled under identical conditions?

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What person, if any, is credited with the notion of making course/momentum changes to a spacecraft by tethering it briefly to an asteroid or other natural object?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How do fusion scientists expect to produce enough Tritium to sustain D-T fusion (see text)?	836
Are there flying arthropods that aren't insects?	83
in the FAQ it is stated that one proof of the universe's expansion is that "more distant galaxies are packed closer together". What sort of measurements have been made to show this?	68
How long would it take a black hole of Jupiter's mass (and spin, charge, etc. if relevant) to evaporate due to Hawking radiation?	1
Why is faster than light travel said to violate causality?	1
A great deal of effort has gone into studying the big bang, the beginning of our universe. To me, it seems the other extreme, the end of the universe, or heat death, has been much less well studied. Why is this?	1
How much helium-3 is present in Saturn's atmosphere?	1
When emptying plastic ice trays, why do some cubes come out clean and perfect and some come out all frazzled and broken around the edges, even though the trays were seemingly cooled under identical conditions?	1
What person, if any, is credited with the notion of making course/momentum changes to a spacecraft by tethering it briefly to an asteroid or other natural object?	1