Overview

Located in the northern sky, Triangulum is a small constellation, also known as the Triangle. It is one of the 48 constellations listed by the Greek astronomer Ptolemy in the 2nd century. Triangulum is the 78th constellation in size, occupying an area of 132 square degrees. It is visible to observers located between +90° and -60° latitude.

Stars

The brightest star in the Triangulum constellation is Beta Trianguli, also known as Mothallah, which means “triangle” in Arabic. It is a yellow-white main-sequence star located about 65 light-years away from Earth.

Deep-Sky Objects

Triangulum is home to several notable deep-sky objects, including the Triangulum Galaxy (M33) and the Pinwheel Galaxy (M101). The Triangulum Galaxy is the third-largest member of the Local Group of galaxies, after the Milky Way and Andromeda. It is a spiral galaxy approximately 3 million light-years away from Earth. On the other hand, the Pinwheel Galaxy is a face-on spiral galaxy situated about 21 million light-years from our planet.

Overall, the Triangulum constellation holds numerous intriguing celestial objects that captivate both professional and amateur astronomers alike!