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Scientific American Cygnus X-1, the first black hole ever discovered, is significantly bigger than previously believed Print An image of the Cygnus X-1 system from NASA’s Chandra X-ray Observatory. Credit: NASA and CXC Advertisement New evidence suggests the first known black hole is bigger than previously thought, which may force scientists to reconsider their understanding of how giant stars give rise to black holes. Scientists think stellar-mass black holes, which contain up to a few times the sun s mass, form when giant stars die and collapse in on themselves. The first black hole ever discovered was Cygnus X-1, located within the Milky Way in the constellation of Cygnus, the Swan. Astronomers saw the first signs of the black hole in 1964 via gas it sucked away from a closely orbiting blue supergiant star. As this gas spiraled into the black hole, it became so hot it emitted high-energy X-rays and gamma-rays that satellites could detect.

Western australiaXueshan zhaoJames miller jonesCurtin universityRadio astronomy researchInternational centerChinese academy of sciencesMilky wayVery long baseline arrayChinese academyமேற்கு ஆஸ்திரேலியாஜேம்ஸ் மில்லர் ஜோன்ஸ்கர்டின் பல்கலைக்கழகம்வானொலி வானியல் ஆராய்ச்சிசர்வதேச மையம்சீன கலைக்கழகம் ஆஃப் அறிவியல்