M3 (Messier 3) is a globular cluster found about halfway between Cor Caroli, the brightest star in Canes Venatici and Arcturus, the brightest star in the constellation Boötes. Located nearly 34,000 light years away, it is thought to be about 8 billion years old and contains roughly half a million stars.
The cluster is fairly large, reasonably bright and can be found using binoculars or a telescope.
(Click on an image to enlarge.)
The globular cluster M3 culminates tonight. (Magnitude 6.2. Canes Venatici, all night. See images above.)
Events in bold involve objects and/or events that are easily visible with the naked eye.
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Learn more about upcoming astronomical events in 2015 An Astronomical Year (Kindle Edition) and The Astronomical Almanac (2015-2019) (Kindle Edition and Paperback Edition) and 2016 An Astronomical Year (North American Kindle Edition.)
The Amateur Astronomer’s Notebook allows astronomers to log 150 observing sessions and includes an appendix of hundreds of suggested deep sky objects.
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