The arrangement of the spiral arms in the galaxy Messier 63, also known as NGC 5055, recall the pattern at the centre of a sunflower. So the nickname for this cosmic object — the Sunflower Galaxy — is no coincidence.
Discovered by Pierre Mechain in 1779, the galaxy later made it as the 63rd entry into fellow French astronomer Charles Messier’s famous catalogue, published in 1781. The two astronomers spotted the Sunflower Galaxy’s glow in the small, northern constellation Canes Venatici (the Hunting Dogs). We now know this galaxy is about 27 million light-years away and belongs to the M51 Group — a group of galaxies, named after its brightest member, Messier 51, another spiral-shaped galaxy dubbed the Whirlpool Galaxy.
Galactic arms, sunflowers and whirlpools are only a few examples of nature’s apparent preference for spirals. For galaxies like Messier 63 the winding arms shine bright because of the presence of recently formed, blue–white giant stars.
Object: M 63 / NGC 5055 Photo taken in: April 2021 Distance: 30 million light years Diameter: 100,000 light years Exposure: 342 x 300 sec. for RGB 66 x 900 sec. with dual narrow band Total: 45 hours Calibration: Darks / Flats / DarkFlats Mount: Skywatcher EQ6-R PRO Telescope: Lacerta Fotonewton 250/1000 Corrector: Lacerta GPU coma corrector Filter: Astronomik L2 UV-IR Block 2 ″ Optolong filter L-eXtreme 2 ″ Camera: QHY268c @ Gain 0 at -15 ° C Guiding: ZWO OAG with QHY5III462c and PHD2 Software: APP / Photoshop CC