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Triangulum
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NGC 604 nebula Illustration of the Andromeda constellation as a woman in a pink dress chained to a rock, with constellation stars marked on her body, from Urania's Mirror, circa 1820.
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Ursa major constellation illustration art. (Big Dipper) stars, space, night sky)
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Latin:
“Triangle”
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Triangulum

constellation
Written by
Erik Gregersen
Erik Gregersen is a senior editor at Encyclopaedia Britannica, specializing in the physical sciences and technology. Before joining Britannica in 2007, he worked at the University of Chicago Press on the...
Erik Gregersen
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

Triangulum, constellation in the northern sky at about 2 hours right ascension and 30° north in declination. Its brightest star is Beta Trianguli, with a magnitude of 3.0. The brightest stars in the constellation form an obvious triangle. This constellation contains M33, one of the nearest spiral galaxies at a distance of 2.8 million light-years. The ancient Greeks compared it to the capital letter Δ (delta).

Erik Gregersen
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