The Triangulum (M33)
The Little Sister of the Local Group

The Triangulum Galaxy is the third-largest galaxy in our local group (after the Milky Way and Andromeda).
It’s also a spiral galaxy, about 60,000 light-years wide.
It has bright regions where new stars are forming — a real cosmic nursery!
Fun Fact: It’s one of the farthest objects visible to the human eye without a telescope.
🏛️ Origin of the Name
The Triangulum Galaxy is named after the constellation Triangulum, where it is found in the night sky.
“Triangulum” is Latin for “triangle.”
The constellation got its name because its three main stars form the shape of a small triangle.
Why the Name:
It’s located inside the Triangulum constellation, and the word literally means “triangle galaxy.”
The Triangulum Galaxy is the third-largest galaxy in our local group (after the Milky Way and Andromeda).
It’s also a spiral galaxy, about 60,000 light-years wide.
It has bright regions where new stars are forming — a real cosmic nursery!
Fun Fact: It’s one of the farthest objects visible to the human eye without a telescope.
🏛️ Origin of the Name
The Triangulum Galaxy is named after the constellation Triangulum, where it is found in the night sky.
“Triangulum” is Latin for “triangle.”
The constellation got its name because its three main stars form the shape of a small triangle.
Why the Name:
It’s located inside the Triangulum constellation, and the word literally means “triangle galaxy.”