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What causes the universe to expand? | HIX Tutor

It was previously thought the <a href="http://socratic.org/astronomy/scale-of-the-universe/expansion-of-the-universe">expansion of the universe</a> 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.

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.

Levi Acosta

Dark energy causes the universe to expand.