description Triangulum Overview
Triangulum is a small constellation in the northern sky whose principal stars form a distinctive triangular pattern. It is one of the 48 constellations listed by the second-century astronomer Ptolemy and remains one of the 88 modern constellations recognized by the International Astronomical Union. The constellation contains the Triangulum Galaxy, also known as Messier 33, a spiral galaxy that belongs to the Local Group.
help Triangulum FAQ
What is the constellation Triangulum named after?
Triangulum is named for the small triangle formed by its principal stars. Its shape is easier to identify than many faint northern constellations.
Who first listed Triangulum as a constellation?
Triangulum was included among the 48 constellations catalogued by the Greek astronomer Ptolemy in the second century. It remains one of the 88 modern constellations.
Where can Triangulum be seen?
Triangulum is a northern-sky constellation and is best viewed from the Northern Hemisphere during autumn and winter evenings. It lies near Andromeda and Aries.
What famous galaxy is in Triangulum?
The Triangulum Galaxy, also called Messier 33 or M33, lies within the constellation. It is a nearby spiral galaxy and a member of the Local Group.
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