Which law describes the expansion of the universe?

Edwin Powell Hubble an American astronomer who was a pioneer of astronomy and the Hubble telescope is named after him….

Why is it known as HUBBLE'S law?

jsh, Thank you Lynne for answering this. Most scientific discoveries/laws are named after the person who discovered them.

noyfb john, nothing is actually something. Kraus.

noyfb john, wider universe? More space between celestial bodies?