Why is the night sky dark? “Because the sun isn’t up!” But wait — if the universe is chock full of stars just like our sun, why isn’t it bright day and night?

NASA recently released the deepest-ever view of the universe, an amazing photo that combines 10 years’ worth of Hubble Space Telescope images. The photo contains about 5,500 galaxies, and that doesn’t even begin to scratch the surface. With so many stars and galaxies, shouldn’t it be a little brighter at night?

Popular YouTube channel Minute Physics explores this question in a new fact-filled video that will illuminate the science geek in all of us.

Check out the great video above.

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