jul 112012
 
Ghost Galaxies Unmasked

  Astronomers have puzzled over why some puny, extremely faint dwarf galaxies spotted in our Milky Way galaxy’s back yard contain so few stars. Simulation of dark matter in the Milky Way halo These ghost-like galaxies are thought to be some of the tiniest, oldest, and most pristine galaxies in the universe. They have been [continue reading]