Triangulum Galaxy is known as a spiral galaxy. It is just around 3 million light years away from the Earth lies in the Triangulum constellation. It is also called as NGC 598 or Messier 33. It was firstly assumably discovered before1654 by Italian astronomer, Giovanni Battista Hodierna. It was independently discovered on August 25–26, 1764 by French astronomer, Charles Messier.