Cancel

Skywatch - MP3

Menu

Episode 338: Hubble's Variable

Play Jun 16•4:34

In 1920, the nature of spiral nebulae, now known as spiral galaxies, was unknown. The scale and expansion of the universe were unknown as well. Astronomers debated whether the spiral objects they could see in the sky were within our galaxy or outside it. The astronomer Edwin Hubble devoted considerable time to observing stars in Andromeda, the largest known spiral nebula of the time. He found a...

Report

Are you sure you want to report this content as offensive?

Confirm Cancel

This content has been reported.


Close
30
30
0:00 / 0:00