Beehive Cluster M44
The Beehive Cluster can be seen by the naked eye as a hazy patch of light at a distance of 600 light years in the
dim constellation Cancer.  The cluster formed about 600 million years ago, and contains about a thousand stars.  
Dominating this image are at least 15 bright blue stars of spectral class A and another 4 red giants of spectral class

This image combined 50 minutes of red, 42 minutes green and 36 minutes of blue exposures, all unbinned.  An
ST2000XM camera was used through a Takahashi Sky 90 refractor.
Music:  Flight of the Bumblebee, by Rimksy-Korsakov
click on image for full size