dec 012013
 
The Oldest Brown Dwarfs in our Galaxy Discovered

  A team of astronomers led by Dr David Pinfield at the University of Hertfordshire have discovered two of the oldest brown dwarfs in our Milky Way galaxy. These ancient objects are moving at speeds of 100-200 kilometers per second, much faster than normal stars and other brown dwarfs and are thought to have formed [continue reading]

feb 222013
 
Remnant of Swallowed Galaxy Detected?

    Peering deep into the vast stellar halo that envelops our Milky Way galaxy, astronomers using NASA’s Hubble Space Telescope have uncovered tantalizing evidence for the possible existence of a shell of stars that are a relic of cannibalism by our Milky Way. This illustration shows the disk of our Milky Way galaxy surrounded [continue reading]

feb 152013
 
Anne's Picture of the Day: Emission Nebula NGC 6164

February 15, 2013 NGC 6164, an emission nebula in Norma Image Credit & Copyright: Don Goldman, Astrodon Imaging (http://www.astrodonimaging.com) NGC 6164 is a bipolar emission nebula of about 4 light-years across that lies some 4,200 light-years away from Earth in the southern constellation of Norma. It is approaching us at approximately 53.9 kilometers per second. [continue reading]

okt 252012
 
Mysterious Infrared Background Glow Comes From Stray Stars

  A new study using data from NASA’s Spitzer Space Telescope suggests a cause for the mysterious glow of infrared light seen across the entire sky. It comes from isolated stars beyond the edges of galaxies. These stars are thought to have once belonged to the galaxies before violent galaxy mergers stripped them away into [continue reading]

jun 122012
 
Why Black Holes Grow Faster Than Their Host Galaxy

  New evidence from NASA’s Chandra X-ray Observatory challenges prevailing ideas about how supermassive black holes grow in the centers of galaxies. Astronomers long have thought that a supermassive black hole and the bulge of stars at the center of its host galaxy grow at the same rate — the bigger the bulge, the bigger [continue reading]