Messier 81

Introduction
Messier 81, also known as M81, NGC 3031, Bode's Galaxy, UGC 5318, MGC+12-10-010 or PGC 28630, is A Grand Design Spiral Galaxy located inside The Ursa Major Constellation(Big Bear Constellation, Big Dipper). A Grand Design Spiral Galaxy is a Spiral Galaxy that has highly visible, prominent, well-designed Spiral Arms; All of The Grand Design Spiral Galaxies are Messier 51, Messier 74, Messier 81, Messier 83 and Messier 101. Bode's Galaxy is located 12 Million Light-Years Away from Earth. Bode's Galaxy has a mass of 50 Billion Solar Masses and a diameter of 90,000 Light Years. 
Profile of Bode's Galaxy
Messier 81 was discovered on December 31st, 1774 by German Astronomer Johann Elert Bode. This is why Messier 81 can also be called Bode's Galaxy. Later in 1779, around 5 years later,  French Astronomer Charles Messier and French Astronomer Pierre Mechain, renamed Bode's Galaxy as Messier 81 and listed it in The Messier Catalogue. Within Messier 81, One Supernova has been detected. That Supernova has been observed as a Type II Supernova. Messier 81 is the largest galaxy within The M81 Group. The M81 group is a collection of 34 Galaxies located inside Ursa Major Constellation.