Would time stop if the universe stopped expanding?

Vernie McCullough asked a question: Would time stop if the universe stopped expanding?
Asked By: Vernie McCullough
Date created: Mon, May 24, 2021 1:39 AM

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Those who are looking for an answer to the question «Would time stop if the universe stopped expanding?» often ask the following questions:

❔ What if universe stopped expanding?

Some 13.8 billion years ago a very hot small and dense singularity expanded into what we now call the universe. It hasn't stopped growing since but what if it did. What if all the galaxies, stars and planets everything stopped.planets everything stopped.

❔ What if the universe stopped expanding?

Here’s what would happen if the Universe stopped expanding. Before the 1920s, when Edwin Hubble observed that galaxies moved away from each other, we thought that the Universe was static. Years later, the Hubble Space Telescope showed us that not only is Universe is expanding, but it’s growing at ever-increasing rate.

❔ Is universe expanding?

Expanding universe means that the galaxies have been moving away from each other since the beginning of the Big Bang. The galaxies are not expanding through space, they are expanding in space since space is also expanding. In simple words, everything in the space is moving away from each other and there is no centre for the universe. Edwin Hubble made the observation and was the first to prove that the universe is expanding. He came up with the calculation to show how fast the galaxies are ...

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A common theory (The Big Crunch) is that the universe will one day stop expanding and start to contract, reversing and get so clumped that it will eventually cause another Big Bang. So it really depends on what the cause of the universe to stop expanding is to determine if we (or the universe) be affected or not.

Can we stop the universe from expanding? The fate of the universe is determined by its density. The preponderance of evidence to date, based on measurements of the rate of expansion and the mass density, favors a universe that will continue to expand indefinitely, resulting in the “Big Freeze” scenario below.

Posted January 17, 2010 The Universe is constantly expanding and as a consequence some very distant stars are moving away from us at speeds greater than the speed of light. This means that these stars will never be seen by us. If the Universe stopped expanding, or worse, started shrinking, the radiation from those distant stars would reach us.

A recontraction ("big crunch") is ruled out by GR given the observed cosmological parameters of the universe. So it would contradict GR for the universe to stop expanding, and therefore GR can't say anything about what would happen then. It's possible that the universe will stop expanding. If so, then it will constitute a disproof of GR.

The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand "into" anything and does not require space to exist "outside" it.

It’s also true that while time is linear, passing at that constant perceived rate of one second per second, the rate at which the Universe expands is not. The Universe expanded much more quickly in...

I think I explained, you'd have to instantaneously somehow add a lot of matter energy. It seems to me it'd take some time to stop. So, really pretty unphysical. There has been speculation that the Higgs field is close to an unstable value, and if it got somehow shoved (?) it could become so. Another expanding bubble would start Someplace, and reach us.

If the universe stopped expanding there could be only two reasons for it. Either gravity has increased to the point where the entire universe becomes bound together (which would cause it to collapse), or it means time has stopped. However this doesn't mean that time would stop if the universe stopped expanding.

By that time, the Earth would be long gone – absorbed by a red giant star that used to be our Sun. At some point, it would reach its eventual temperature minimum – Absolute Zero, or zero K. On the Celsius scale, that is −273.15° (-459.67° F). At that temperature atoms themselves would stop moving. The universe would become absolutely lifeless.

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