APOD- Spiral Galaxy in Triangulum.

The constellation Triangulum, called the Nile delta, Deltotum, or the Island of Sicily by the ancients, is home to M33, a spiral galaxy sometimes called the Pinwheel Galaxy or simply the Triangulum Galaxy. It was probably discovered by Hodierna prior to 1654, but was independently discovered by Charles Messier in 1764 and made a part of his grouping of Messier, or M-, objects. M33 is over 50,000 light-years in diameter, making it the third-largest in our Local Galactic Sector, after Andromeda and our own Milky Way. M33 is actually approaching our galaxy at a rate of about 182 km/s or more accurately, wuth regards to motion around the galactic center, around 24 km/s.