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Astronomers, using NASA's Hubble Space Telescope have come up with what they say is some of their best evidence yet for the presence of a rare class of "intermediate-sized" black hole that may be lurking in the heart of the closest globular star cluster to Earth, located 6,000 light-years away. Like intense gravitational potholes in the fabric of space, virtually all black holes seem to come in two sizes: small and humongous. It's estimated that our galaxy is littered with 100 million small black holes (several times the mass of our Sun) created from exploded stars. The universe at large is flooded with supermassive black holes, weighing millions or billions of times our Sun's mass and found in the centers of galaxies. A long-sought missing link is an intermediate-mass black hole, weighing in somewhere between 199 and 10,000 solar masses. How would they form, where would they hang out, and why do they seem to be so rare?

Find out why July 2023 was a record-breaking month, a high-flying NASA aircraft is helping to study lighting, and making landings safe for flights of the future... a few of the stories to tell you about - This Week at NASA!

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