View Full Version : Dark Matter Bends Light from a Distant Quasar

2005-Sep-07, 10:53 PM
SUMMARY: Gravitational lensing happens when the light from a distant object, such as a quasar, is distorted by the gravity of a closer object. Astronomers have discovered just such a lens, where the distortions are so great, they have to be caused by a significant amount of dark matter - the visible material alone couldn't be responsible. Dark matter is predicted by its gravitational influence on galaxies and stars in the Universe, but so far, astronomers aren't really sure what it is; whether it's just regular matter which is too cold to be seen from Earth, or some kind of exotic particle.

View full article (http://www.universetoday.com/am/publish/dark_matter_light_quasar.html)
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