Open Cluster, M103

M103 is an open cluster of stars in the constellation of Cassiopeia over 7,000 light years away. The bright red star in the middle of the photograph is a red giant. The bright blue star to its right is a double star, that is to say these two stars orbit each other.

 

Fifty four 20 sec exposures at ISO3200 taken with a Nikon D300 were merged to create this image.

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