Thousands of stars crowd the center of the globular cluster Messier 79 in this Hubble Space Telescope. The cluster is about 40,000 light-years from Earth, in the constellation Lepus. Almost all of its stars are among the most ancient in the Milky Way Galaxy. The cluster might not have originated in the Milky Way, however. Instead, the Milky Way might have stripped it from a smaller galaxy billions of years ago. [NASA/ESA]
Find out more in our radio program entitled Messier 79.