... Nebula (also known as Messier 20 and NGC6514) is an H II region with a remarkable collection of open cluster, emissionnebula (the lower, red portion), reflection nebula (the upper, blue portion) and dark nebula (the septation within the emissionnebula ...
... Nebula (also known as Messier 20 and NGC6514) is an H II region with a remarkable collection of open cluster, emissionnebula (the lower, red portion), reflection nebula (the upper, blue portion) and dark nebula (the septation within the emissionnebula ...