NGC 2403 in Camelopardalis . ... Some 10 million light-years distant and about 50,000 light-years across, the spiral galaxy also seems to have more than its fair share of giant star forming HII regions , marked by the telltale reddish glow of atomic hydrogen gas. ... A member of the M81 group of galaxies, NGC 2403 closely resembles another galaxy with an abundance of star forming regions that lies within our own local galaxy group, M33 the Triangulum Galaxy . ... NASA Official: Jay Norris. ...