Scientists are pretty sure black holes are real. Soon they’ll know for sure. Subscribe to our channel! The biggest problem with trying to detect a black hole is that even the supermassive ones are relatively tiny. “The largest one in the sky [is] the black hole in the center of the Milky Way,“ Dimitrios Psaltis, an astrophysicist at the University of Arizona, writes me in an email. “And taking a picture of it would be equivalent to taking a picture of a DVD on the surface of the moo
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