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The Triangulum Galaxy (also known as Messier 33 or NGC 598) is a spiral galaxy approximately 3 million light-years away in the constellation Triangulum. The galaxy is also sometimes informally referred to as the Pinwheel Galaxy by some amateur astronomy references and in some public outreach websites. However, the SIMBAD Astronomical Database, a professional astronomy database that contains formal designations for astronomical objects, indicates that the name "Pinwheel Galaxy" is used to refer to Messier 101, and several other amateur astronomy resources and other public outreach websites also identify Messier 101 by that name. It is the third largest galaxy in the Local Group, a group of galaxies that also contains the Milky Way Galaxy and the Andromeda Galaxy, and it may be a gravitationally bound companion of the Andromeda Galaxy. The Pisces Dwarf (LGS 3), one of the small Local Group member galaxies, is possibly a satellite of Triangulum.

Bagged By: Julian Tworek
Instrument: AstroTrac, Canon100-400 lens @ 200mm ISO 1600 4 x 120s modified Canon 20D
Details: Taken at Kelling Heath Star Party 2010

Bagged by: Andrew Wilson
LX200 8", MX916 CCD
Please note that all pictures are copyrighted and may not be used without the explicit permission of the owner.
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