NGC 2261 is a variable reflection nebula located in the constellation Monoceros, at about 2.500 light-years away. The nebula is illuminated by the star R Monocerotis and it manifests ch...
IC 2944 (also known improperly as the Lambda Centauri Nebula, sometimes indicated by the acronym C 100) is an H II region of the southern Milky Way visible in the constellation Centauru...