Breakthrough: The Ideas That Changed the World

Discovering the Big Bang

Clip: Episode 1 | 5m 28s

In 1923, Edwin Hubble began the manual process of photographing the Andromeda Nebula. He spent many nights at the Hooker telescope collecting data and discovered that Andromeda was not a cluster of stars in our own galaxy but in fact a separate galaxy.

Aired: 04/17/19

Rating: TV-PG

Video has closed captioning.

The full episode is no longer available for online streaming. Why?

Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.

Problems Playing Video?