Quiz · Dark Energy and the Cosmic Push

Question 1What surprising discovery led scientists to propose dark energy?

The universe is slowly shrinking in size The universe is growing faster and faster over time Distant stars are moving closer to our galaxy Gravity has stopped working on distant stars

Question 2According to the passage, what makes up most of the universe?

Stars, planets, and people Invisible clouds of cosmic gas Dark energy Black holes

Question 3What do some researchers think dark energy might be?

A basic property of empty space itself A message sent by another civilisation Heat left over from exploding stars A mistake in the measurements of galaxies