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Quasars over 1000 times brighter than Milky Way stars

Last Updated: Thursday, July 25, 2013, 20:31

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.

`Sideline quasars` stifled early galaxy formation

Last Updated: Friday, March 22, 2013, 13:19

University of Colorado Boulder astronomers have claimed that "sideline quasars" teamed up with one of the brightest quasars glowing in the universe 11 billion years ago in order to prevent small galaxy formation.

Quasars to help scientists map structure of universe

Last Updated: Wednesday, September 19, 2012, 15:39

Researchers have found a possible way to map the spread and structure of the universe, guided by the light of quasars.

Most quasars powered by black holes live on snacks, not large meals

Last Updated: Wednesday, June 20, 2012, 12:06

Quasars are the brilliant beacons of light that are powered by black holes feasting on captured material, and in the process, heating some of the matter to millions of degrees.

NASA’s Hubble discovers quasars acting as gravitational lenses

Last Updated: Friday, March 16, 2012, 13:22

Quasars are among the brightest objects in the universe, far outshining the total starlight of their host galaxies.

Largest-ever 3D map of distant universe `created`

Last Updated: Monday, May 02, 2011, 23:40

The map was made using light from 14K quasars with the 3rd Sloan Digital Sky Survey.