Preview Messier 17, the Swan Nebula, aka the Omega or Checkmark Nebula, with the open cluster M18 below it. Image ID: 1350-64 Artist: Alan Dyer Purchase a commercial license Buy framed prints & more from our print store canon 5d mkii m17 m18 messier omega sagittarius swan nebula open cluster star cluster sky skies astronomy astro photography star stars astro photography science nature astro
