Some 13.8 billion years ago, the universe began with a rapid expansion we call the big bang. After this initial expansion, which lasted a fraction of a second, gravity started to slow the universe down. But the cosmos wouldn’t stay this way. Nine billion years after the universe began, its expansion started to speed up, […]
Category:
Dark Energy, Dark Matter, Euclid, Galaxies, James Webb Space Telescope (JWST), Nancy Grace Roman Space Telescope, SPHEREx (Spectro-Photometer for the History of the Universe and Ices Explorer), Stellar Evolution, The Big Bang, The Universe
Posted on
February 5, 2024
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