jul 202013
Link Between Stars' Ages and Their Orbits in Dense Cluster

  Astronomers using NASA’s Hubble Space Telescope have for the first time linked two distinct populations of stars in an ancient globular star cluster to their unique orbital dynamics, offering proof that the stars do not share the same birth date. The globular cluster 47 Tucanae. Image Credit & Copyright: Michael Sidonio (http://www.pbase.com/strongmanmike2002) The analysis of the [continue reading]

okt 032012
Anne's Picture of the Day

October 3, 2012 47 Tucanae, a bright globular cluster in Tucana Image Credit & Copyright: J-P Metsavainio (http://astroanarchy.zenfolio.com/) 47 Tucanae (NGC 104) or just 47 Tuc is a globular cluster that contains millions of stars in a region of about 120 light-years across, making it one of the most massive globular clusters in the Milky [continue reading]