The Sunflower Galaxy (also known as Messier 63, M63, or NGC 5055) is an w:unbarred spiral galaxy in the w:Canes Venatici w:constellation. It is a w:flocculent spiral galaxy, consisting of a central disc surrounded by many short spiral arm segments. The Sunflower Galaxy is part of the w:M51 Group, a group of galaxies that also includes the Whirlpool Galaxy (M51).
The Sunflower Galaxy was discovered by w:Pierre Méchain on w:June 14 w:1779. The galaxy was then listed by w:Charles Messier as object 63 in the w:Messier Catalogue.
In the mid-1800s, w:Lord Rosse identified spiral structure within the galaxy, making this one of the first galaxies in which such structure was identified.