110 objects compiled by Charles Messier (Originally it was just 100 objects, but in the 1970's a few more were added, supposedly based on some of Messier's notes).
M1 (NGC1952) - Crab Nebula
M27 (NGC6853) - Dumbbell Nebula
M33 (NGC598) - Triangulum Galaxy
M41 (NGC2287)
M51 (NGC5194-5) - Whirlpool Galaxy
M42 (NGC1976 - Orion Nebula) and M43 (NGC1982- De Mairan's Nebula)