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Space & Astronomy

Space exploration and astronomy

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.pbsspace...

Watch Original10/20/2026
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