Cosmology
4 questions
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What causes fast radio bursts?
Flashes of radio waves lasting a few thousandths of a second arrive from distant galaxies thousands of times a day.
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What is dark energy?
Something makes the expansion of the universe speed up. It makes up most of the cosmos, and we don't know what it is.
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What is dark matter made of?
Most of the matter in the universe gives off no light and has never been caught by a detector. What is it?
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Why is there more matter than antimatter?
The Big Bang should have made equal amounts of both, and they should have annihilated. Yet here we are.