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Read more about Astronomers discover concentration of small black holes in cluster NGC 639 on Business Standard. The researchers used previous estimates of the stars' tiny proper motions (their apparent motions on the sky), which allow for determining their true velocities within the cluster
They are much more compact and littered with stars, and tend to be much older than galaxies. The globular cluster NASA focused on was 7,800 light-years away and known as NGC 6397, which is "almost as old as the Universe itself". When looking at the cluster, NASA researchers believed there was an intermediate-mass black hole, which are long thought of as the "missing link" between supermassive black holes and stellar black holes. Black hole discovery: NASA's Hubble spots 'concentration' of black holes (Image: NASA, ESA, T. Brown, S. Casertano, and J. Anderson (STScI)) Black holes continue to a...
"NGC 6397": Concentration of small black holes discovered Globular clusters are extremely dense stellar systems, which host stars that are closely packed together Friday February 12, 2021 10:14 PM, IANS Washington: In an unexpected finding, astronomers have discovered a concentration of smaller black holes, instead of one massive black hole, lurking at the heart of the globular cluster NGC 6397. Globular clusters are extremely dense stellar systems, which host stars that are closely packed together. These systems are also typically very old -- the globular cluster at the focus of this study, ...
Today, NASA shared a rather interesting update about the goings-on of the Hubble Space Telescope. Astronomers with the Paris Institute of Astrophysics (IAP)