* Astronomy

Deneb (Alpha Cygni) is the brightest star in the constellation Cygnus and one of the vertices of the Summer Triangle. It is the 19th brightest star in the night sky, with an apparent magnitude of 1.25. A blue-white supergiant, Deneb is also one of the most luminous nearby stars. It is, or has been, known by a number of other traditional names, including Arided and Aridif, but today these have fallen out of use.
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