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Deneb is a bright, blue supergiant star, very young as stars go. Albireo, the bill of the swan, is actually two stars which exhibit a spectacular amber and blue (one might even say "maize and blue") contrast. Cygnus is also sprinkled with a variety of nebulae, planetary, diffuse and dark.
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www.windows.ucar.edu/tour/link=/the_universe/Constellat...
www.windows.ucar.edu/tour/link=/the_universe/Constellations/summer/cygnus.html&edu=high
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Statistics, description and images of Cygnus X-1, a stellar mass black hole ... Several thousand light-years away, near the "heart" of Cygnus, the swan, two stars are locked in a gravitational embrace. One star is a blue supergiant, known as HDE 226868. It is about 30 times as massive as the Sun and 400,000 times brighter.
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blackholes.stardate.org/directory/factsheet.php?p=Cygnu...
blackholes.stardate.org/directory/factsheet.php?p=Cygnus-X-1
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Doppler studies of this blue supergiant in Cygnus indicate a period of 5.6 days in orbit ... A blue supergiant star, about 15 times the mass of the sun, ...
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hyperphysics.phy-astr.gsu.edu/Hbase/astro/blkbin.html
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Cygnus X-1 Black Hole Star Solar Supergiant Masses Mass Object Economy. ... Cygnus X-1black hole orbiting a blue giant star. Cygnus X-1 (often abbreviated to Cyg X-1 is an X-ray source in the Cygnus constellation, and considered to be one of the most likely black hole candidates. The optical counterpart HDE 226868 is a...
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www.economicexpert.com/a/Cygnus:X:1.html
www.economicexpert.com/a/Cygnus:X:1.html
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The Cygnus X-1 system consists of a black hole with a mass about 10 times that of the Sun in a close orbit with a blue supergiant star with a mass of about 20 Suns. Gas flowing away from the supergiant in a fast stellar wind is focused by the black hole, and some of this gas forms a disk that spirals into the black hole.
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www.sciencedaily.com/releases/2009/08/090831130817.htm
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ScienceDaily (June 16, 2009) — The red supergiant star Betelgeuse, ... Cygnus X-1: Still A 'Star' After All Those Years (Aug. 31, 2009) — Since its discovery 45 years ago, Cygnus X-1 has been one of the most intensively studied cosmic X-ray sources. About a decade after its discovery, Cygnus X-1 secured a place in...
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www.sciencedaily.com/releases/2009/06/090609220555.htm
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Cygnus’s brightest star, Deneb, marks the tail of the swan; its name comes from dhanab, the Arabic word for ‘tail’. The Greeks had no name for this prominent star. Deneb is a highly luminous supergiant, ... Cygnus lies in the Milky Way and hence contains many attractive star fields for sweeping with binoculars.
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www.ianridpath.com/startales/cygnus.htm
www.ianridpath.com/startales/cygnus.htm
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A supergiant star is a huge star that is either red or blue. The blue ones are really hot and the red ones ar really cool. ... However, the blue super giant HDE 226868 will either be sucked into Cygnus X-1 or become a blackhole itself. The other supergiants will end by turning into a black hole. The blue stars are hotter...
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www.faqs.org/qa/qa-10705.html
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