Subject :NSO Class : Class 5
Why is universe expanding?
Ans 1:
Class : Class 5
Humble law
Ans 2:
Class : Class 8
The American astronomer Edwin Hubble made the observations in 1925 and was the first to prove that the universe is expanding. He proved that there is a direct relationship between the speeds of distant galaxies and their distances from Earth. This is now known as Hubble's Law.