Description:
Messier 63, also known as the Sunflower Galaxy, is a beautiful spiral galaxy located about 27 million light-years away in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1779 and later included in Charles Messier’s famous catalog of deep-sky objects.
M63 is a flocculent spiral galaxy, meaning its spiral arms are patchy and less well-defined than in classic "grand-design" spirals like M51. Despite this, its arms are bright with star-forming regions and give the appearance of sunflower petals—hence the nickname. It has a bright, yellowish core filled with older stars and sprawling outer arms rich in young blue stars and dust lanes.
The galaxy is part of the M51 Group, which also includes the more famous Whirlpool Galaxy. Like many spirals, M63 shows evidence of past gravitational interactions that may have contributed to its structure. It spans roughly 100,000 light-years across—similar in size to our Milky Way.