What causes the universe to expand?

1 Answer
Dec 17, 2015

Dark Energy.


It was previously thought the expansion of the universe will continue for a while, stop and than the universe will contract again like a ball thrown upwards towards the sky stops after some time and then fall down again.

But actually this is not the case. Scientists believe that there is something called a Dark Energy that is increasing the expansion of the universe. Currently it is estimated that about 68% of the universe contains Dark Energy.