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The Cygnus Loop - Hidden within the Veil Nebula
The Cygnus Loop, or Sharpless 103, is a large supernova remnant (SNR) in the constellation Cygnus, an emission nebula measuring nearly 3° across. Some arcs of the loop, known collectively as the Veil Nebula or Cirrus Nebula, emit in visible light. Radio, infrared and X-ray images reveal the complete loop.
The visual portion of the Cygnus Loop is known as the Veil Nebula (also called the Cirrus Nebula or the Filamentary Nebula). Several components have separate names and identifiers, including the “Western Veil” or “Witch’s Broom”, the “Eastern Veil”, and Pickering’s Triangle.
Credit: NASA, Hubble, Spitzer
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