Messier Number 5

Fernando Oliveira de Menezes from São Paulo, Brazil

The fifth object in Charles Messier’s catalog of extended objects is a globular cluster — a dense, spherical collection of stars that are typically older and red. But this image shows off the numerous young, blue stars, which scientists think may have formed in stellar collisions. The shot was taken with a 6-inch scope and 1.6 hours of exposure.