Constellation: Triangulum
Distance: 3 Million light years
Magnitude: 5.7
Visual Size: 70 x 41 arcminutes
Other Designations: NGC598

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.
With a diameter of about 50,000 light-years, it is the third largest galaxy in the Local Group, a group of galaxies which also contains the Milky Way Galaxy and the Andromeda Galaxy, and it may be a gravitationally bound companion of the Andromeda Galaxy. Estimates indicate that Triangulum may be home to between 30 and 40 billion stars, compared to the 1000 billion stars for Andromeda and c. 200-400 billion for the Milky Way.