Messier 63

Messier 63 (also known as M63, NGC 5055, or the Sunflower Galaxy) is a spiral galaxy in the constellation Canes Venatici consisting of a central disc surrounded by many short spiral arm segments. Messier 63 is part of the Messier 51 Group, a group of galaxies that also includes M51 (the 'Whirlpool Galaxy').

Messier 63 or Sunflower Galaxy

M63 was discovered by Pierre Méchain on June 14, 1779. The galaxy was then listed by Charles Messier as object 63 in the Messier Catalogue. In the mid-19th century, Lord Rosse identified spiral structures within the galaxy, making this one of the first galaxies in which such structure was identified.[3]

In 1971, a supernova with a magnitude of 11.8 appeared in one of the arms of M63.

HGS Session References

HGS Session</ref>HGS Sessions - Clearing Dorado, Leo Minor, Musca, Perseus constellations - 3/23/2015

References

Found in HGS Manual on Page 108

Found in HGS Manual on Page 115