... This large circular H II (partially ionized hydrogen gas) region is a combination of NGC 2237, NGC 2238, NGC 2239, NGC 2246 and the central star cluster of NGC 2244 (Caldwell 50).This star forming region is also known as Caldwell 49 and is located in the ...
... IC 1805 is a young star cluster surrounded by Ha emitting nebulosity. The hydrogen has been ionized by ultraviolet radiation from young hot stars. ...
... This ionized Hydrogen region in Cygnus is next to the star Deneb and covers a region ... It is comprised of ionized gas and dust and is about 2,500 light-years away ...
... glows with a particular color, depending on its electrical state (ionized or neutral) and on the energy of the particle that ... Ionized nitrogen molecules produce blue light; neutral nitrogen glows red. ...
... This large circular H II (partially ionized hydrogen gas) region is a combination of NGC 2237, NGC 2238, NGC 2239, NGC 2246 and ... The large reddish nebula in the outer spiral arm is the HII (ionized hydrogen) region, NGC 604. ...