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Friday, September 14, 2012

The planets can form in the Galactic Center


Due to the insensitive environmental conditions, the planets could not form near the galactic center. However, new research conducted by astronomers at the Harvard-Smithsonian Center for Astrophysics shows that it is possible to form planets in these vortices cosmic.
                               
As evidence point to the recent discovery of a cloud of hydrogen and helium galactic heading downtown. They argue that this cloud represents the remains of a shattered protoplanetary disk orbiting a star invisible.


"This unlucky star was pushed to the central black hole. And although she survives, its protoplanetary disk may not have the same luck," said lead author Ruth Murray-Clay. The results appear in the journal Nature.

The protoplanetary cloud was discovered last year by a team of astronomers using the VLT technology. Then there was speculation that had formed from gas that flowed from one star to another when the two collided. But Murray-Clay and Avi Loeb propose a different explanation. Newborn stars are able to retain a surrounding disk of gas and dust for eons. If the star is introduced into the vortex of the gravitational force of the central black hole in our galaxy, the tidal forces and gravitation would shatter this hard in a matter of years. They also identified the possible source of the lost star: a ring of stars orbiting the galactic center at a distance of about a tenth of a light year. Astronomers have detected dozens of bright young stars in this ring, suggesting that there could also be stars similar to the Sun interactions between stars could throw into the galactic center to one or several of his companions, along with their protoplanetary disks.

Although this is destroying protoplanetary disk, the stars that remain on the disk could still maintain their own. Therefore planets could form in spite of the hostile environment in which they live. As the stars are coming closer and closer to the galactic center attracted by the gravitational pull of the black hole, their records will be torn away, leaving only a dense stellar core. The friction heats the gas to temperatures high enough to be detected.

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