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Results tagged with space-expansion
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user 345235
The expansion of the universe is a phenomenon wherein, at scales much larger than galaxies, the distance between objects grows over time. This phenomenon is often described as "expansion of space", although there is no difference between space expanding and objects moving apart.
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Is cosmological constant really constant?
The default expectation is that the density of dark energy is constant, for theoretical reasons. That's why it was historically called a cosmological constant. If you take the Einstein field equations …
