mrt 222013
‘Sideline Quasars’ Helped to Stifle Early Galaxy Formation

  University of Colorado Boulder astronomers targeting one of the brightest quasars glowing in the Universe some 11 billion years ago say “sideline quasars” likely teamed up with it to heat abundant helium gas billions of years ago, preventing small galaxy formation. This is an artist’s impression of a distant quasar. The dust is hiding the view [continue reading]