This pretty galaxy could easily be confused with the Triangulum galaxy, but the two, in fact, are not related. Instead, this is NGC 2403: a remarkable spiral galaxy seen face-on from our vantage point. It can be found approximately 8 to 12 million light-years from Earth in the Camelopardalis constellation.
Like Triangulum, NGC 2403 has spans around 50,000 light-years across — making both just half the size of the Milky Way — and uncountable number of pinkish H II regions. In fact, i can't think of a single galaxy lit up by more of them than this one, which is most likely the product of a galaxy merger of some kind.
Also seen in this stunning image, near the 9 o'clock position (beneath the galaxy's central core), is a supernova that happens to be one of the brightest in recent memory, called SN2004dj. Other members of the Messier 81 (M81) galaxy group, which contains over 34 galaxies, linger nearby — namely NGC 2404. It's so close, the two are literally connected by the arm.
See a larger image here.