This NASA/ESA Hubble Space Telescope image of a dense swarm of stars shows the central region of the globular cluster NGC 2808. Astronomers were surprised when Hubble spied three generations of cluster stars. The Hubble images were taken in May 2005 and in August and November 2006.
ESA/NASA/G. Piotto (Univ. of Padua)/A. Sarajedini (Univ. of Florida)