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Dark Energy May Not Exist: Something Stranger Might Explain the Universe
There might not be a mysterious 'dark' force accelerating the expansion of the Universe after all.
Over time, these voids take up a larger proportion of the Universe, creating the illusion of an accelerating expansion, without needing to conjure up any dark energy. In 2017, astronomers from the University of Canterbury in New Zealand tested timescape cosmology against observations, and found that it was a slightly better fit than ΛCDM to explain cosmic expansion. These explosions shine with a predictable brightness every time, so shifts in their light can reliably reveal distance, speed and direction of movement.
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