Input (grade 13): The Dumbbell Nebula (also known as Messier 27, M 27, or NGC 6853) is a planetary nebula (PN) in the constellation Vulpecula, at a distance of about 1,360 light years.
Output (grade 12): The Dumbbell Nebula (sometimes called Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula.