the lagoon nebula. messier 8

25 72 146 1764 6523 6853 about also amateur an and apple arcminutes as binoculars brightness catalogued charles classified cloud constellation core diameter discovered distance dumbbell easily emission first galaxy giant gum ii interstellar it its known lagoon lightyears m8 magnitude messier nebula ngc object observing or planetary popular rcw region sagittarius sharpless space star target telescopes this visible visual vulpecula was