This chart shows the northern constellation of Triangulum (The Triangle). All the stars that can be seen with the naked eye on a dark and clear night are marked. The chart also shows the nearby spiral galaxy, Messier 33, often called the Triangulum Galaxy. This galaxy can be seen without optical aid by people with good eyesight under exceptionally dark skies, and is usually considered to be the most distant naked-eye object, at a distance of about three million light-years.