okt 032013
 
Anne's Image of the Day: Irregular Galaxy UGC 5189

October 3, 2013 UGC 5189, an irregular galaxy in Leo Image Credit: X-ray: NASA/CXC/Royal Military College of Canada/P.Chandra et al.; Optical: NASA/STScI UGC 5189 is an irregular galaxy of about 36,000 light-years across that lies some 163 million light-years away from Earth in the constellation of Leo (the Lion), while it is speeding away from [continue reading]

mei 162012
 
A Supernova Cocoon Breakthrough

  Observations with NASA’s Chandra X-ray Observatory have provided the first X-ray evidence of a supernova shock wave breaking through a cocoon of gas surrounding the star that exploded. This discovery may help astronomers understand why some supernovae are much more powerful than others. On November 3, 2010, a supernova was discovered in the galaxy [continue reading]