universe expansion

What is dark matter and dark energy? Discover the invisible forces shaping 95% of the universe — from galaxy rotation curves to the accelerating cosmos.

Dark energy makes up 68% of the universe's energy content and drives cosmic acceleration. If it vanished, the universe would no longer expand at an accelerating rate. Instead, gravity would decelerate expansion, and the universe would either stabilize into a steady expansion, re-contract (Big Crunch), or remain nearly stable — depending on the matter density.