Home > Astronomy > Time Scale of the Cosmos

How old is our Universe?

Answer 1

Best estimate so far: 13.79 to 13.82 billion years.

Cosmic background radiation measurements provide the universe's cooling time since the Big Bang, and measurements of the universe's expansion rate allow one to extrapolate backward in time to determine the universe's approximate age.

Age of the Universe on https://tutor.hix.ai

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Alexander Acosta

no predictions

You can find the estimated age of the universe on a number of websites, such as Wikipedia. However, let me pose a slightly different question to you: what does it mean to ask "how old"? Does that mean the universe's age in years? In any case, I'd like to say that you could measure the lifespan of something like u-n-i-v-e-r-s-e because it is quite large and time passes relative. Cheers!

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 3

Luca de

The age of the universe is estimated to be about 13.8 billion years.

By signing up, you agree to our Terms of Service and Privacy Policy

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.