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Dark matter and dark energy are inferred from different observations. One supplies unseen gravitating matter and helps structure form; the other accounts for accelerated expansion in standard cosmology. This comparison…
Dark energy is a name for an observation, not an explanation of it. The observation is that cosmic expansion is speeding up, and the whole question is whether the thing…
Measure how fast the universe is expanding using the afterglow of the Big Bang, and you get one number. Measure it using nearby stars and exploding suns, and you get…
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