Messier 71 is a bit of a puzzlement. Is it an abnormally dense open star cluster or an unusually loose globular cluster? M71 isabout 13,000 light-years from Earth in the constellation Sagitta. It has an apparent magnitude of 6.1 and appears as a faint patch of light with a pair of binoculars.

This Hubble image of M71 is a composite of  visible and infrared light.

Image Credit: NASA / ESA