It’s estimated that about 100 million black holes roam around our Milky Way Galaxy — and for the first time ever, astronomers now believe they may have precisely measured the mass of an isolated black hole with Hubble.
Roaming black holes are born from rare, monstrous stars that are at least 20 times more massive than our Sun. After these stars explode in a supernova, the remnant core is crushed by gravity into a black hole. Because this self-detonation isn’t perfectly symmetrical, the black hole might get “kicked” and careen through our galaxy.
Astronomers believe that the isolated black hole measured by Hubble is traveling across the Milky Way at 100,000 miles per hour (160,000 kph). That’s fast enough to get from Earth to the Moon in less than three hours!
Read more about this discovery: https://go.nasa.gov/3mx6t6p.
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