Is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop a supernova remnant. The source supernova was a star 20 times more massive than the Sun, and it exploded around 21,000 years ago. The distance estimates of
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Astrophotography by Dariusz Krzempek
During an astrophotography session in outdoors,
You can find many different power
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