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Cygnus X-1 (other)
Cygnus X-1 is an X-ray source in the constellation Cygnus. Cygnus X-1 may also refer to: * Cygnus X-1 (song series), "Cygnus X-1" (song series), a two-part song by the band Rush * "Cygnus X-1", a song by Bethany Curve from the album ''Gold (Bethany Curve album), Gold'' See also * Cygnus X (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a galactic X-ray source in the constellation Cygnus and was the first such source widely accepted to be a black hole. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources detectable from Earth, producing a peak X-ray flux density of (). It remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass about 21.2 times the mass of the Sun and has been shown to be too small to be any known kind of normal star or other likely object besides a black hole. If so, the radius of its event horizon has "as upper bound to the linear dimension of the source region" of occasional X-ray bursts lasting only for about 1 ms. Cygnus X-1 belongs to a high-mass X-ray binary system, located about 2.22 kiloparsecs from the Sun, that includes a blue supergiant variable star designated HDE 226868, which it orbits at about 0.2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
