astronomy

Williamina Fleming moved from Scotland to Boston with her husband at the age of 21, so she likely knew her life would change—but she had no idea how much.

We take it for granted that we know what Earth looks like. But what did people think before we went up to space and saw the truth for ourselves?

The Hubble Deep Field is one of the most remarkable images ever taken, and it will change the way you look at the night sky forever.