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Stars are looking at a black hole
Astronomers have detected a radio signal from a black hole known as Sagittarius A* for the first time. The signal was found in images taken by the Hubble Space Telescope of Centauri, a cluster of 10 million stars around 18,000 light-years from Solar System. The black hole could be at least 8,200 times as big…
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The accretion instability of black holes and neutron stars has something in common
The Milky Way’s central black hole, Sagittarius A*, is a fast-moving supermassive black hole, which is nearly four times more massive than the Sun, scientists have claimed. The model estimates how quickly matter is falling on the black hole from the brightness of the bagels of light. They also suggest that X-ray eclipses constrain the…