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Globular Cluster in Canes Venatici

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Messier 3 is one of the brightest globular clusters in the sky.  It is about 32,000 light year away, and contains about half a million stars.  Globular clusters vary quite a bit in how densely packed with stars their central regions are.  As this picture shows, Messier 3 has a very dense center.

Magnitude 6.4
Apparent Size 16'
Distance (light yrs) 32,000
Right Ascension 13:42.2
Declination +28 32

Image details:  Exposure times of 30 minutes luminance, 9 minutes each of red, green, and blue, taken with an SBIG ST-8300M imager and a 14" Meade LX850 telescope at f/6.

July 2014