apr 072014
 
Anne's Image of the Day: Galaxy Cluster Abell 1689

  April 7, 2014 Abell 1689, a galaxy cluster in Virgo Image Credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA), J. Blakeslee (NRC Herzberg Astrophysics Program, Dominion Astrophysical Observatory), and H. Ford (JHU) Abell 1689 is a galaxy cluster of some 2 million light-years across, located almost 2.5 billion light-years away in the constellation of [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]

feb 152012
 
How globular star clusters survive collisions

Simulations shed new light onto the turbulent birth of objects approx. 13 billion years ago Our Milky Way galaxy is surrounded by some 200 compact groups of stars, which, viewed through small telescopes, look like snowballs. These globular clusters are 13 billion years old, which is almost as old as the universe itself. Now a [continue reading]