Friday, June 25, 2010 | By Asmita
The ASTRONOMY & ASTROPHYSICS reported that there are four super-massive black holes.The scientists used the world's two largest optical/infrared telescopes,Keck,on top of Mauna Kea in Hawaii to find these black holes or dying stars that are called active galactic. For the first time, the team observed a quasar with an active galactic nucleus,as part of the group of four black holes.Scientists believe that these active nuclei are powered by accreting super-massive black holes.The accreting gas and dust are especially bright in the optical and infrared regions of electromagnetic spectrum.
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