Discovering the Big Bang
Clip: Episode 1 | 5m 28s Video has closed captioning.
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.
Problems Playing Video? | Closed Captioning