description Cygnus Loop Overview
A large supernova remnant in Cygnus spanning about 3 degrees on the sky, formed roughly 10,000 years ago and encompassing the well-known Veil Nebula and Pickering's Triangle.
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Cygnus Loop ranks #188 of 577 in the Nebula ranking, behind Seagull Nebula, ahead of Thor's Helmet (NGC 2359).
help Cygnus Loop FAQ
How old is the Cygnus Loop nebula?
The Cygnus Loop is a supernova remnant that was formed by an exploding star roughly 10,000 years ago. The light from that massive explosion finally reached Earth's sky in the distant past, leaving behind the glowing filaments we see today.
Is the Veil Nebula the same thing as the Cygnus Loop?
The Veil Nebula is actually a specific, bright visual portion of the much larger Cygnus Loop supernova remnant. Other well-known features within this massive structure include Pickering's Triangle and the Witch's Broom nebula.
Where can I find the Cygnus Loop in the night sky?
The nebula is located in the northern constellation of Cygnus the Swan. It spans about 3 degrees on the sky—roughly six times the diameter of the full moon—but it is extremely faint and requires a telescope to observe.
What caused the Cygnus Loop to form?
The structure was created when a massive star reached the end of its life and exploded in a catastrophic supernova event. The resulting shockwave from this explosion continues to expand through space, slamming into surrounding interstellar gas and dust to create the glowing filaments of the loop.
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