Home > Astrophysics > Big Bang and Universe Evolution

What evidence do we have that the space between the stars is not completely empty?

Answer 1

It depends, of course, on your definition of empty. A physicist might argue that it is filled with millions of atoms and photons, the latter of which is obviously true. Some might argue that it is empty because it is a vacuum devoid of any objects with which to interact.

There is no real rejection to the statement "Space is empty." Space is filled with innumerable particles and isn't empty, so before you ask for proof, you might want to be more specific.

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

Answer 2

Emilia Acosta

The presence of interstellar dust, gas, and cosmic rays indicates that the void in between stars is not entirely empty.

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.