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24 maj 2017 · Of course, the real universe is not this orderly, but the idea is the same. If the universe were static — that is, not expanding or contracting — the coins (galaxies) would just stay there.
The simple answer is that no, time is not expanding or contracting. The complicated answer is that when we're describing the universe we start with the assumption that time isn't expanding or contracting. That is, we choose our coordinate system to make the time dimension non-changing.
19 lis 2023 · Hubble helped astronomers see that we live in an expanding universe, where the galaxies are moving away from one another. This discovery is known as Hubble’s law (or the Hubble-Lemaître law).
20 maj 2022 · Einstein’s static universe was a special case; the universe might also expand forever, or expand for a while, then contract to a point and then begin expanding again. Friedmann’s paper...
t. e. The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. [1] It is an intrinsic expansion, so it does not mean that the universe expands "into" anything or that space exists "outside" it.
17 sty 2019 · This year marks the 90th anniversary of a mind-boggling discovery: that the universe is expanding. The discovery was spearheaded by Edwin Hubble, for whom the orbiting Hubble Space Telescope is...
19 lis 2019 · The universe encompasses everything in existence, from the smallest atom to the largest galaxy; since forming some 13.7 billion years ago in the Big Bang, it has been expanding and may be infinite in its scope.
