Composite images obtained wi the 3.58-metre NTT at La Silla Observatory.
The Omega Nebula, an aa kent as the Swan Nebula, Checkmark Nebula, an the Horseshae Nebula (catalogued as Messier 17 or M17) is an H II region in the constellation Sagittarius.
↑ 1.0 1.1 1.2 1.3 1.4 "SIMBAD Astronomical Database". Results for NGC 6618. Retrieved 2006-11-16.
↑ Holden, Edward S. (January 1876). "The Horseshoe Nebula in Sagittarius". Popular Science. 8: 269–281.
This page wis last eeditit on 8 Julie 2016, at 18:24.