TIL: The Andromeda galaxy takes more more space in the sky than the moon
I always thought a galaxy resolved to around the same size as a star in the night sky, but some are way larger (in angular size) than the moon.
Below is a representation of how the Andromeda galaxy would look like next to the moon if it was bright enough to be visible with the naked eye.
Here is another comparison from Nasa's Astronomy Picture of the Day:
Credit goes to jcims from a post on hackernews