Triangulum
HemisphereNorthern Sky
Area132 sq deg
SymbolTriangle
About Triangulum
The Triangle. One of the smallest constellations but ancient, listed by Ptolemy. Contains the Triangulum Galaxy M33, the third largest galaxy in our Local Group after Andromeda and the Milky Way. M33 is about 3 million light-years away and visible to the naked eye under excellent conditions. The galaxy is approaching Andromeda and may have already interacted with it.
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