Employees of the University of Utah and the Smithsonian Astrophysical Observatory in Cambridge (Massachusetts), Ben Bromley and Scott Kenyon said that they managed to find an explanation for why the Kuiper belt ends abruptly at a distance of 4.7 billion miles (7.52 billion km) from the Sun.
Kuiper Belt — a cluster of small objects orbiting at a great distance from the Sun (beyond the orbit of Neptune). Perhaps, this belt is a remnant of the primordial disk of gas and dust, which originated all the planets in the solar system.
According to the two astrophysicists, reinforced by simulations conducted on a supercomputer at NASA's Jet Propulsion Laboratory in Pasadena, about 4 billion years ago there was a rapprochement between the Sun and other stars, around each of which was available for a gazovopylevoy drive.
Bromley and Kenyon believe that it is a result of the Kuiper Belt was like "cut off" from the edge of the other gazovopylevym drive. In addition, it is possible that only begun to take shape with circular orbits of the planets, as a result of this convergence have been thrown on the elliptical orbit.
It is likely that opened in 2003 planetoid Sedna, rotating around the sun in an incredibly eccentric orbit beyond the orbit of Pluto, was born at all, and not in the solar system, and the one that passed by our Sun on an assumed distance of 14-19 billion miles (22 -30 billion kilometers). It is possible that at that — another solar system could reach the planet, whose formation began in the solar system.
Hence the so-called "Exoplanets" that were formed and initially orbiting other stars, it may be present in the solar system itself.
As for the prospects of other similar meetings (ie the convergence of the two stars at a dangerously small distance), then, according to Bromley, this is not possible because the Sun is no longer part of the cluster of stars in which it was born, so that such a rendezvous in the near time can not be afraid.
Battery News, 07.12.2004 18:13