View Full Version : First Triple Quasar Discovered

2007-Jan-09, 01:51 AM
Quasars are some of the brightest objects in the Universe, beaming radiation across billions of light-years of space. Although they were a mystery for many years, astronomers now believe they're the bright radiation from matter clogging up around an actively feeding supermassive black hole. ...

Read the full blog entry (http://www.universetoday.com/2007/01/08/first-triple-quasar-discovered/)

2007-Jan-09, 03:15 PM
If this is a line of sight effect as opposed to tightly gravitationally coupled objects, is it remarkable? I'm not sure how we know what the intrinsic brightness of a quasar is nor whether they tend to be "standard" or fall into several standard categories.

2007-Jan-09, 03:32 PM
If you read the original press release, they ruled out that it was a gravitational lens. And they were able to determine that the three quasars are at the same distance because of redshift. If they're that close, they must be gravitationally interacting.