Credit & Copyright: Karel TeuwenExplanation: This 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. Even in this impressively sharp image, individual stars are difficult to distinguished in the densely packed core, but colors 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 at the deep telescopic view also reveals a host of background galaxies. Itself about 200 light-years across, the giant star cluster is a relatively bright, easy target for binoculars in the northern constellation Canes Venatici, The Hunting Dogs, and not far from Arcturus.
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Based on Astronomy Picture Of the Day
Publications with keywords: M 3 - globular cluster
Publications with words: M 3 - globular cluster
- NGC 4372 and the Dark Doodad
- Millions of Stars in Omega Centauri
- APOD: 2023 February 20 Á NGC 1850: Not Found in the Milky Way
- APOD: 2023 January 30 Á Globular Star Cluster NGC 6355 from Hubble
- M13: The Great Globular Cluster in Hercules
- Globular Star Cluster 47 Tuc
- Comet Leonard Before Star Cluster M3