The Expanding Universe: A Future Without End?

Transcript

00:00Today the universe continues to expand, a process first discovered by astronomer

00:06Edwin Hubble in the early 20th century. He observed that galaxies are moving

00:12away from each other and the further they are the faster they recede. This

00:17discovery provided strong evidence for the Big Bang Theory and forever changed

00:22our understanding of the cosmos. But what does the future hold for an expanding

00:28universe? Will it continue to grow forever, its galaxies drifting further and

00:33further apart until the stars themselves fade into darkness? Or will the

00:39expansion one day slow, stop and reverse, leading to a collapse of big crunch that

00:46brings everything back to a singularity?