M 93 is an open cluster in the constellation Puppis. It
is 3600 light years from earth, and 10-20 light years in
diameter. The cluster is made especially striking by the
several blue and red giant stars among its members. The
stars in this cluster formed about 100 million years ago.

Image data:
Camera: Canon 350 XT (modified)
Exposure: ISO 800, 2 minutes x 12
Telescope: 10" Schmidt-Newtonian, Baader coma corrector, LPS filter