(click on image to enlarge)
From NASA/ESA, August 24, 2020: While appearing as a delicate and light veil draped across the sky, this image from the NASA/ESA Hubble Space Telescope actually depicts a small section of the Cygnus supernova blast wave, located around 2400 light-years away. The name of the supernova remnant comes from its position in the northern constellation of Cygnus (The Swan), where it covers an area 36 times larger than the full moon.
The original supernova
explosion blasted apart a dying star about 20 times more massive than
our Sun between 10 000 and 20 000 years ago. Since then, the remnant has
expanded 60 light-years from its centre. The shockwave marks the outer
edge of the supernova remnant and continues to expand at around 350
kilometres per second. The interaction of the ejected material and the
low-density interstellar material swept up by the shockwave forms the
distinctive veil-like structure seen in this image.
Credit: ESA/Hubble & NASA, W. Blair
