... Messier 20 and 21 . ... The beautiful Trifid Nebula, also known as Messier 20, is easy to find with a small telescope in the nebula rich constellation Sagittarius. ... Flying Past Neptunes Moon Triton . ... What would it look like to fly past Triton, the largest moon of planet Neptune? ... Why does this galaxy have such a long tail? ... On the morning of August 11, its monstrous form hovered in the mist above municipal buildings near the town center. Comet Jacques, Heart and Soul . ...