M3 Globular clsuter in Canes Venatici
An immense ball of half a million stars older than the Sun lies over 30,000 light-years away. Cataloged as M3 (and NGC 5272), it is one of about 150 globular star clusters that roam the halo of our Milky Way Galaxy. Individual stars are difficult to distinguished in the densely packed core, but colours are apparent for the bright stars on the cluster's outskirts. M3's many cool "red" giant stars take on a yellowish cast, while hotter giants and pulsating variable stars look light blue. A closer look also reveals a host of background galaxies. About 200 light-years across, the giant M3 star cluster is actually bigger yet a little further away than the more famous M13. Lies in the northern constellation Canes Venatici, The Hunting Dogs, and not far from Arcturus. Overhead in May.
Good to compare with M13.
Orion Optics UK AG16 Astrograph: SBIG 11000 CM: Titan Mount, Pixinsight and Photoshop CS5.5
16 x 3 minutes (48 minutes total)
Data capture May 6th 2013