The star-forming region of Messer 17 is more popularly known as the Omega Nebula or Swan Nebula . . . or perhaps you might know it as the Lobster Nebula, Horseshoe Nebula, or maybe even the Checkmark Nebula.
No matter how many names it has, the beauty of this star-forming region is quite singular. The cavernous shape, made visible by creating a composite image from the Subaru and Hubble telescopes, is created when the hot winds from young stars sweep the faint wisps of gas and dust outward.
M17 can be found around 5,000 light-years from Earth in the constellation of Sagittarius.
-RLO
Image: Subaru Telescope (NAOJ), Hubble Space Telescope, Color data: Wolfgang Promper, Processing: Robert Gendler