4.3 billion light years away, in a distance galaxy, 2 black holes have been identified, they are not ordinary black holes, they are supermassive black holes, that is they are millions or billions time massive than our Sun. Usually these kind of black holes lies in the center of the galaxy.
Super massive black holes are surrounded by disk of glowing hot gas, commonly with that it forms quasar. Quasars are monstrous objects in space and with its colossal power can outshine the entire galaxy.
The quasar named SDSS J1502+1115 is in constellation Bootes, 4.3 light years away is actually 2 supper massive black holes and are almost 24,000 light years apart. But when scientists looked one black hole closely with intercontinental array of radio dishes – which can produce sharper images than Hubble Space Telescope – they discovered that one of the black hole is actually a duo.
This new found pair of black holes are actually 450 light years apart and orbiting each other every 4 million years. There is only one more tightly paired black hole we ever discovered and that is 24 light years apart.
Scientists believe that tightly paired black holes can help detect “gravitational wave” predicted by general relativity, but so far no known binary black holes are tight enough to cause detectable gravitational wave.
Source: ScienceMag
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