Is universe finite or infinite?

The observable universe is finite in that it hasn’t existed forever. It extends 46 billion light years in every direction from us. (While our universe is 13.8 billion years old, the observable universe reaches further since the universe is expanding).

Who said that the universe is finite?

Aristotle’s answer was that the material universe must be spatially finite, for if stars extended to infinity, they could not perform a complete rotation around Earth in 24 hours. Space must then itself also be finite because it is merely a receptacle for material bodies.

How can the universe be finite but unbounded?

What’s the Difference? A finite yet unbounded universe is one that has a finite volume, that is a specific number of galaxies, but has no three dimensional “edge”. Such is true if our universe is unbounded, but on a much grander scale, and without a moment of transition.

What is the infinite universe theory?

Infinite Universe Theory One of the major theories of cosmology — the study of space — is that the universe we live in might not have an endpoint, but instead goes on forever.

Is the universe infinite or finite?

The universe may be infinite, but we can only see a finite section of it due to the finite speed of light.

How much of the universe can we see?

The universe may be infinite, but we can only see a finite section of it due to the finite speed of light. We can only see those parts from which light has had time to reach us since the beginning of the universe – which means we can (in theory) see a spherical universe with radius of about 47 billion light years.

How many galaxies and planets are there in an infinite universe?

So there would be an infinite number of galaxies and planets in an infinite universe. If however there is an infinitesimal probability of something happening, then in an infinite universe there would only be a finite number (for example 1) of those things.

Is the universe flat or flat?

The universe appears (exactly) flat, and for simplicity the universe is infinite. Note that we distinguish between the observable universe (which is the local patch that light could have travelled between since the Big Bang) and the totality — we have constraints that even if the universe is not infinite,…