What is expansion of universe?
Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM
Edwin Hubble first observed that the galaxies in our universe are not stationary and are moving away from each other.
The larger the distance between galaxies, the faster they move away from each other.
This shows that the universe is expanding.
Answered by | 4th Jun, 2014, 03:23: PM
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