jul 262013
 
Quasars Influence Galaxy Growth

  Quasars are among the brightest, oldest, most distant, and most powerful objects in the Universe. Powered by massive black holes at the center of most known galaxies, quasars can emit enormous amounts of energy, up to a thousand times the total output of the hundreds of billions of stars in our entire Milky Way. [continue reading]

mei 052012
 
Quasars shine a new light on cosmic distances

  An international team of scientists has developed a method to determine the distances to quasars throughout the universe. This could allow quasars to be used as standard candles. The researchers found characteristic patterns in the light given off by a group of quasars and say that these regularities are directly related to the redshift [continue reading]