NASA's Hubble shows link between stars' ages and their orbits

Astronomers using NASA's Hubble Space Telescope have determined the orbital motion of two distinct populations of stars in an ancient globular star cluster, offering proof they formed at different times and providing a rare look back into the Milky Way galaxy's early days.

Fuente : http://www.eurekalert.org/pub_releases/2013-07/nsf...