The death of the universe
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The shape, contents and future of the universe are all intricately related. We know that it’s mostly flat; we know that it’s made up of baryonic matter (like stars and planets), but mostly dark matter and dark energy; and we know that it’s expanding constantly, so that all stars will eventually burn out into a cold nothingness. So is there any beauty of this dark ending?
People often confuse dark matter and dark energy, but they are fundamentally very different. What is the difference between them?
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