Why is the sky dark at night?
Have you ever wondered why the sky is dark at night? The fact that the space between the stars is dark is less obvious than you might think, and has given rise to the so-called "Olbers' paradox." In this video, I explain the solution.
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I am a professor of astronomy and astrophysics at the University of Rome Tor Vergata.
To learn more about the topics in this video, I recommend my book "The Darkness Beyond the Stars."
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Image and video credits: Y. Beletsky (LCO)/ESO, B. Fugate (FASORtronics)/ESO, Mikael Cronhamn from FreeImages.com, Wynand Van Niekerk from FreeImages.com, Gabor Szakacs from FreeImages.com, Wikimedia Commons NASA/JPL-Caltech, NAO, ESO, ESO/José Francisco Salgado.
Cover photo by Joshua Earle from unsplash.com
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