M 67 is an open cluster in the constellation Cancer.
M 67 is among the oldest open clusters, at 4 billion
years. Most open clusters drift apart by the time they
reach 1 billion years. M 67 is particularly interesting
because its age and the chemical composition of many of
its stars closely match the sun.

Image data:
Camera: Canon 350XT
Exposure: ISO 800, 30 seconds x 60
Telescope: 10" Schmidt-Newtonian