NASA's Hubble Space Telescope may have discovered a rare intermediate-sized black hole in a globular star cluster 6,000 light-years away.
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Black holes
Generally, black holes fall under three categories based on mass: stellar mass, supermassive, and intermediate mass.
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Supermassive black holes
The universe is said to be filled with supermassive black holes, which weigh millions or billions of times the mass of our Sun.
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Mystery of black holes
Intermediate-mass black holes weigh anywhere between 100 and 100,000 solar masses. The hunt for these elusive cosmic objects has heated up in recent years.
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Investigation
Researchers used the Hubble telescope to search for a black hole in the core of a globular star cluster called Messier 4.
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Study
Researchers estimate that the black hole in M4 could be 800 times our Sun's mass.