Cygnus X-1 - Wikipedia
In 2006, Cygnus X-1 became the first stellar-mass black hole found to display evidence of gamma-ray emission in the very high-energy band, above 100 GeV. The signal was observed …
Cygnus X-1: The black hole that started it all
Mar 3, 2021 · Today, we know black holes exist — we even have a picture of one! But scientists haven’t had definitive evidence of black holes for very long. The first one, Cygnus X-1, was …
First black hole ever found is more massive than previously ...
Feb 18, 2021 · New observations of the black hole–star pair called Cygnus X-1 indicate that the black hole weighs about 21 times as much as the sun — nearly 1.5 times heavier than past …
How Was Cygnus X-1, the First Black Hole, Discovered?
Cygnus X-1, companion object to the blue super giant star HDE 226868, is located in the constellation Cygnus at 19 hours 58 minutes 21.9 seconds Right Ascension and 35 degrees …
Cygnus X-1 | black hole, neutron star, X-ray source | Britannica
Cygnus X-1, binary star system that is a strong source of X-rays and that provided the first major evidence for the existence of black holes. Cygnus X-1 is located about 7,000 light-years from …
Weird Object: Black Hole Cygnus X-1 | Astronomy.com
Apr 17, 2015 · Cygnus X-1’s singularity — the collapsed star at its center — achieved black hole density when it became 3.7 miles (6.0km) wide. Yet the star shriveled still further, to the size of …
NASA’s IXPE Reveals Shape, Orientation of Hot Matter Around ...
Nov 3, 2022 · Cygnus X-1, discovered in 1964, was the first cosmic object ever identified as containing a black hole. Now, NASA telescopes have teamed up to reveal new details about …
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