The Cygnus Loop is a 20,000-year-old supernova remnant that has expanded into a huge bubble of glowing gasses about 120 light-years in diameter, which is about the size of six full Moons on the sky.

#Hubble images of a filament of shocked gas at the edge of the Cygnus Loop taken in 2001 and 2020, show the expansion of the bubble.

More: https://hubblesite.org/contents/news-releases/2023/news-2023-018

#astronomy #space #nebula

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