Puzzle The Cygnus Loop Nebula (NASA)

This design features an image of the Cygnus Loop nebula, showing its wispy tendrils of hot dust and gas in bright blue. The nebula is located around 1,500 light-years away from our solar system. A nebula (the plural is "nebulae" or "nebulas") is an interstellar cloud of dust, hydrogen, helium and other ionized gases. The Cygnus Loop Nebula is a supernova remnant, which means that it was produced after a massive stellar explosive around 5,000 to 8,000 years ago.