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Citat:Citat:The six most distant known objects in the solar system with orbits exclusively beyond Neptune (magenta) all mysteriously line up in a single direction. Also, when viewed in three dimensions, they all tilt nearly identically away from the plane of the solar system. Batygin and Brown show that a planet with 10 times the mass of Earth in a distant eccentric orbit anti-aligned with the other six objects (orange) is required to maintain this configuration. The diagram was created using WorldWide Telescope. Image by Caltech/R. Hurt (IPAC)
Once upon a time, there were nine planets in our solar system—although some people claimed that somewhere, out there, was a mysterious tenth planet that they called “Planet X.” In 2006, the IAU reclassified Pluto, in a hotly contested move that left the solar system with only eight official planets.
But this week, researchers published their argument that somewhere, out there, there is another large planet that we haven’t seen yet. Caltech’s Mike Brown and Konstantin Batygin argue that Planet Nine (which is not the same as Pluto, and also not the same as the old Planet X) should have a mass about 10 times that of Earth, and an orbit about 20 times farther from the sun than that of Neptune.
Izvor: http://www.sciencefriday.com/segments/somewhere-out-there-planet-nine/
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