- Astronomers say that two or more large planets may lurk beyond Pluto http://www.nbcnews.com/science/space/far-out-astronomers-say-two-unknown-planets-may-lurk-beyond-n287856 137 comments science
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- Mysterious Planet X May Really Lurk Undiscovered in Our Solar System | Space http://www.space.com/28284-planet-x-worlds-beyond-pluto.html 32 comments
- Trans-Neptunian objects suggest that there are more planets in the solar system http://www.agenciasinc.es/en/news/trans-neptunian-objects-suggest-that-there-are-more-planets-in-the-solar-system 23 comments
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