The biggest black hole: a monster the size of a 21 billion Suns


13/12/2011

Gravity of space objects distort the space is so large that even a ray of light that is close to them, will be absorbed forever. Although the general theory of relativity, Einstein predicted their existence, the great physicist himself doubted it.

But Einstein was wrong. For several decades, we open all the new black hole. Among them are both relatively small, which is dotted with the Milky Way, and the huge, called supermassive black holes, which are located in the center of galaxies.

But even their size pales in comparison to the two black holes that are located at a distance of about 330 million light-years away. Their discovery was just reported in the journal Nature. Even the smaller of the pair is 30% larger than the previous record holder. The larger of these is situated in the center of the galaxy NGC 4889 and two times larger than the other.

They are quasars - a kind of cosmic beacons, with an incredibly bright light which covers polvselennoy. Astronomers first discovered them in the late 1950s, but then no one could not imagine what they are like. Today, most scientists agree that quasars are supermassive black holes in the cores of young galaxies. Holes themselves are invisible, but when they involve surrounding matter, then it is heated to a temperature of millions of degrees and emits energy into space.

At a time when the universe was young, these monsters are no shortage of material, as around them still had plenty of gas. But now most of the gas as quasars, has disappeared. In this case, the black holes that are at the center of quasars, and all are safe and sound, as in the old days. Featuring the most powerful telescopes, astronomers have identified their location. Although scientists can not see black holes directly, they can observe the behavior of surrounding stars, and on the basis of these calculations calculate the mass and density of black holes.

Original: Time com


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