English: Three-colour composite image of the Omega Nebula (Messier 17, or NGC 6618). Credit w:ESO

English: A colour-coded composite image of a sky field in the south-western part of the galactic star-forming region Messier 17. Credit: w:ESO

English: Omega Nebula from w:Hubble Space Telescope

English: Large file

English: Very small file

English: A drawing of the nebula by John Herschel in 1833

English: A second drawing by Herschel, made from South Africa in 1837

English: A drawing by Johann von Lamont in 1837

English: A drawing by Mason in 1839

English: Drawing by William Lassell in 1862

English: Drawing by Trouvelot and Holden in 1875 (with a 6-1/2-inch Refractor)

English: Drawing by Trouvelot in 1875 (26-inch Telescope)