There Are 1 Quadrillion Stars Behind This Grain of Sand

There are nearly 10,000 galaxies and 1 quadrillion stars in a patch of sky no bigger than a grain of sand. How on Earth did we figure this out? Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://www.pbsspacetime.com/shop Sign up for the mailing list to get episode notifications and hear special announcements! https://mailchi.mp/1a6eb8f2717d/spacetime Search the Entire Space Time Library Here: https://search.pbsspacetime.com/ Hosted by Matt O'Dowd Written by Richard Dyer & Matt O'Dowd Post Production by L