What is the dumbbell nebula in the following deep space objects?

The dumbbell nebula is M27, a planetary nebula located in Cygnus. M27 looks like a dumbbell, hence its name. It is a nebula formed by the gas emitted by a star during its evolution, which is about 1 200 light years away from the earth. M27 is one of the important targets for astronomers to study planetary nebulae, and it is also one of the favorite objects for astrophotographers.