Deneb and emission nebulae Deneb Alpha Cygni lower left is a blue giant and one of the most powerful stars known It is the th brightest star in the night sky despite its huge distance from Earth This is estimated to be between and light years exact measurements being difficult at such distances If the latter is correct then Deneb is around brighter than the Sun It would be brighter than the full Moon if it was at the same distance as Sirius the brightest star which is light years away The bright emission nebulae Sh lower right and Sh upper right are also seen These objects all lie in the constellation Cygnus Photographed by the metre Oschin Telescope at Mount Palomar California USA
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Product ID: 22105948263A