The universe has not existed in the same state for an infinite amount of time, that would be the steady state theory, which has been replaced by the big bang theory. The galaxies are moving away from each other because the universe is expanding at an increasing rate. It has been expanding since the big bang happened 13.7 billion years ago.
A receding tide is a tide that is being pulled back into the ocean. The receding tide will then become low tide.
The continuous expansion of the Universe, with all Galaxies receding from each other, is the foundation observation. The Big Bang is the computed start point when all lay together. And where physics as we know it is quite insufficient to probe.
recessive, receding
receding coasts in Mexico
Receding is to sea level and receding is to my hair-line: It means to move back. Sea levels rising and lowering (receding) are usually due to natural events (see "tides" and "ice ages").Scientific evidence, however, proves that humans are causing significant increases in carbon emissions which promote climate change that is actually causing sea levels to rise globally, not recede.
In the words of Mr. Owl, The world may never know.
According to prevailing theories the universe has not existed for an infinite amount of time but is approximately fourteen billion years old.
It can't, at least one of those two suppositions must be false; possibly both.
... expanding. The redshift is attributed to the Doppler effect, meaning that those galaxies are receding, or getting away, from us.
NoRed shift is the Doppler effect as it applies to the light from receding galaxies and stars.As the name suggests, "irregular" galaxies have no specific form, and so the group contains a very diverse selection of objects.
Those that are already farthest from us do.The farther they are from us, no matter in which direction, the faster they're receding from us.The general tendency is that galaxies that are farther from us move away from us faster.
We can't be sure. The only thing we know for sure is that it could be explained asthe speed with which that galaxy is receding from us. If that's actually the causeof the red shift, then from all the red shifts that we observe, we have to concludethat all of the distant galaxies are receding from us, and the farther away one isalready, the faster it's receding. If all of that is true, then the whole universe isexpanding. This is the research that made Hubble famous.Well said, but there is another reason. Maybe the light is coming from a large star (gravity hole, red shift due to gravity).
If you include in your definition of the universe the nothingness beyond where matter currently exists or ever has, then the universe may be infinite even if things are still expanding into the nothingness. But if you define the universe as where matter exists right now, then the universe may or may not be infinite. Remember that space is not a vacuum, it is made up of atoms/ions (mostly hydrogen) in a plasma-like state, far enough apart that it is sometimes (incorrectly) referred to as a vacuum. Definition 1: The last atom/ion defines the edge of the universe.Definition 2: The last possible position that an atom/ion could occupy defines the edge of the universe.Of course these are just my two personal points of view. I don't have proof of either one, and this is purely a conceptual guess. though.
The main evidence for the Big Bang is the expansion of the Universe, as seen from the Doppler effect. That is, light from other stars or galaxies changes color depending on the relative velocity to Earth; it turns out that all far-away galaxies are receding from us.
We can't be sure. The only thing we know for sure is that it could be explained asthe speed with which that galaxy is receding from us. If that's actually the causeof the red shift, then from all the red shifts that we observe, we have to concludethat all of the distant galaxies are receding from us, and the farther away one isalready, the faster it's receding. If all of that is true, then the whole universe isexpanding. This is the research that made Hubble famous.
you, sir, have a receding hairline.
The Big Bang theory predicts an expanding universe. The red shift, being the Doppler effect of light when something is receding from you, confirms this because when looking at galaxies the light emitted from them is red shifted. The farther away galaxies have a higher red shift, confirming that all galaxies are moving away from each other, not just the Milky Way (i.e. the universe is expanding).