Pluto – not only demoted but now being replaced entirely!

In recent news Caltech astronomers Batygin and Brown have announced that they have found evidence of a 9th planet of sufficient size to affect objects in its path. They call it Planet 9, others are calling it the New Pluto, Planet X, or even (rather jokingly) Nibiru.


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 tilt nearly identically away from the plane of the solar system. Batygin and Brown show that a planet with 10 times the mass of the earth in a distant eccentric orbit anti-aligned with the other six objects (orange) is required to maintain this configuration.

Credit: Caltech/R. Hurt (IPAC); [Diagram created using WorldWide Telescope.]

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