Home > Astronomy > Scale of Earth, Sun, Galaxy, and Universe

Is the universe in orbit?

Answer 1

Not as far as we can tell.

Since everything that exists is meant to be included in the definition of the word "universe," what would the universe revolve around?

Apart from that, is there a focal point that it revolves around?

The universe does not seem to have a center, despite the fact that it is composed of many different structures, such as massive super-clusters of galaxies.

This goes against our natural understanding of the Big Bang, which is that it had a center from which the universe burst, but that isn't how it actually works.

The main large-scale motion that we observe is expansion; that is, the different galaxies are mainly moving apart.

The key question is: Will the universe continue to expand forever, or will it slow down and reverse itself, causing a Big Crunch?

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Answer 2

Nova Adams

No, nothing is in orbit around the universe as a whole.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.