The Soap Bubble Nebula
The most beautiful Nebula named Crescent Nebula (NGC 6888) is located in Cygnus the Swan. A little closer to the cosmic bubble located near him. The name of this planetary nebula is soap bubble nebula or PN G75.5 + 1.7. It was discovered by the hobby astronomer Dave Jurasevich through his 160 mm refractor telescope on July 6, 2008.
It does look like a bubble.