What is a light year?

Check out this post from a long time ago, on precisely this: “What exactly is a light year?” 

The image of the Milky Way above (as visualized by an artist), has drawn concentric circles for every 5,000 light years of distance away from the sun, for a little bonus perspective on the size of our galaxy.

Have your own question? Feel free to ask! Or submit your questions via the sidebarFacebook, or twitter.

Sign up for the mailing list for updates & news straight to your inbox!