Astronomers have estimated that Triangulum measures about 50,000 light-years across.

With a diameter of about 60,000 light-years, the Triangulum galaxy is the third largest member of the Local Group of galaxies, roughly 40% the size of the Milky Way.

Triangulum has one star with a confirmed planet and contains one Messier object, Messier 33 (M33, NGC 598, Triangulum Galaxy). The Triangulum Galaxy, also known as Messier 33 (M33), is a spiral galaxy in Triangulum constellation. The Triangulum Galaxy, also known as M33, is one of the closest spiral galaxies to the Milky Way.

The star-forming region NGC 604 is at one o’clock in this image. The Triangulum Galaxy is located nearly 3 million light years from Earth. Triangulum belongs to the Perseus family of constellations, along with Andromeda, Auriga, Cassiopeia, Cepheus, Cetus, Lacerta, Pegasus and Perseus. The star-forming region NGC 604 is at one o’clock in … It is the largest high-resolution mosaic image of Triangulum ever assembled, composed of 54 Hubble fields of view spanning an area more than 19,000 light-years across. Its popular names include the Pinwheel Galaxy or justthe Triangulum Galaxy. Triangulum may be home to 40 billion stars, compared to 400 billion for the Milky Way, and 1 trillion stars for Andromeda Galaxy. NASA's Hubble Space Telescope has produced this stunningly detailed portrait of the Triangulum galaxy (M33), displaying a full spiral face aglow with the light of nearly 25 million individually resolved stars. Its diameter is about 50,000 light-years…

M33 is over 50,000 light-years in diameter, third largest in theLocalGroupof galaxies after the Andromeda Galaxy (M31), and ourown Milky Way. The Triangulum Galaxy is not only surpassed in size by the other two spirals, but by the multitude of stars they contain. It has an estimated mass of ten billion solar masses, though it has fifty … After the Milky Way and Andromeda galaxies, the Triangulum galaxy ranks as the third-largest Local Group member. Triangulum is moving towards the Andromeda Galaxy and a clumpy stream of hydrogen gas and stars is linking Triangulum with Andromeda, what suggests that a past interaction between these two galaxies took place between 2-8 billion years ago, and a more violent encounter 2.5 billion years in the future.

It has an apparent visual magnitude of 5.7 and its angular diameter is 73x45 arc-minutes.

M33 lies at an estimated distance of 3 million light years. Messier 33 or M33 (also designated NGC 598) is a spiral galaxy in the constellation Triangulum.

It measures only about 60 000 light-years across, compared to the 200 000 light-years of the Andromeda Galaxy; the Milky Way lies between these extremes at about 100 000 light-years in diameter [2]. The Triangulum Galaxy (also known as M33) that is about 3 million light-years away from Earth.