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Topic

Planet X

Automatically indexed from the existing article tag.

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Topic

Planet Y

Automatically indexed from the existing article tag.

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Source

NASA Science: Hypothetical Planet X

science.nasa.gov

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NASA Science: Planet Nine

science.nasa.gov

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Caltech: Researchers Find Evidence of a Real Ninth Planet

www.caltech.edu

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arXiv: Generation of Low-Inclination, Neptune-Crossing TNOs by Planet Nine

arxiv.org

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arXiv: Orbit of a Possible Planet X

arxiv.org

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NASA/JPL: WISE Survey Finds Thousands of New Stars, But No Planet X

www.jpl.nasa.gov

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The Planetary Science Journal: No Evidence for Orbital Clustering in the Extreme Trans-Neptunian Objects

www.osti.gov

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Science News: A Distant Planet May Lurk Far Beyond Neptune

www.sciencenews.org

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Exoplanet Facts

science.nasa.gov

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Sun-like-star habitable-planet estimate

www.nasa.gov

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