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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 A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cygnus X-1 (song Series)
"Cygnus X-1" is a two-part song series by Canadian progressive rock band Rush. The first part, "Book I: The Voyage", is the last song on the 1977 album '' A Farewell to Kings'', and the second part, "Book II: Hemispheres", is the first song on the following album, 1978's ''Hemispheres''. Book I is ten minutes and twenty-five seconds long (10:25), and Book II is eighteen minutes and seven seconds (18:07). It was released as a limited-edition extended play on April 22, 2017. General storyline A black hole, known as Cygnus X-1 (an X-ray source believed to be an actual black hole), lies in the constellation Cygnus. An explorer aboard the spaceship '' Rocinante'' journeys toward the black hole, believing there may be something beyond it. As he moves closer, it becomes increasingly difficult to control the ship and he is eventually drawn in by the pull of gravity. The final words of Book I describe his ordeal: "Sound and fury drown my heart/Every nerve is torn apart." The explorer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold (Bethany Curve Album)
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental (native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
