Planet X

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Spotlight


Is there a mysterious Planet Nine lurking in our solar system beyond Neptune? (Charlie Wood, Washington Post)
The Super Earth that Came Home for Dinner (NASA/JPL)

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Physical Realm
Universe Astronomical Instrument
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid

Resources

These are organized by a classification scheme developed exclusively for Cosma. More…

General

Portal

Solar System Exploration: Hypothetical Planet X (NASA)

Encyclopedia

In 1894, with the help of William Pickering, Percival Lowell, a wealthy Bostonian, founded the Lowell Observatory in Flagstaff, Arizona. In 1906, convinced he could resolve the conundrum of Uranus’s orbit, he began an extensive project to search for a planet beyond Neptune, which he named Planet X, a name previously used by Gabriel Dallet. The X in the name represents an unknown and is pronounced as the letter, as opposed to the Roman numeral for 10 (at the time, and now, Planet X would be the ninth planet). — Wikipedia

Science





Caltech Researchers Find Evidence of a Real Ninth Planet (Caltech)
Solar Obliquity Induced by Planet Nine (Elizabeth Bailey, Konstantin Batygin, Michael E. Brown, arXiv.org)

Hypothesis




Library

WorldCat, Library of Congress, UPenn Online Books, Open Library

Community

Organization

International Astronomical Union (IAU)
Minor Planet Center (International Astronomical Union)

News

Phys.org, NPR Archives

Book

ISBNdb

Government

Document

USA.gov

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Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • CHEOPS space telescope takes its first pictures
    on February 10, 2020 at 2:11 pm

    The tension was high: In front of a large screen at the house near Madrid where members of the Consortium participating in the commissioning of the satellite live, as well as at the other institutes involved in CHEOPS, the team waited for the first images from the space telescope. "The first images that were about to appear on the screen were crucial for us to be able to determine if the telescope's optics had survived the rocket launch in good shape," explains Willy Benz, Professor of […]

  • How NASA's Webb Telescope will continue Spitzer's...
    on January 23, 2020 at 2:42 pm

    As one window to the universe closes, another will open with an even better view. Some of the same planets, stars and galaxies we first saw through the first window will appear in even sharper detail in the one that will soon open.

  • Galactic gamma-ray sources reveal birthplaces of...
    on January 14, 2020 at 8:06 pm

    Nine sources of extremely high-energy gamma rays comprise a new catalog compiled by researchers with the High-Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory. All produce gamma rays with energies over 56 trillion electron volts (TeV) and three emit gamma rays extending to 100 TeV and beyond, making these the highest-energy sources ever observed in our galaxy. The catalog helps to explain where the particles originate and how they are accelerated to such extremes.

  • 'Cold Neptune' and two temperate super-Earths...
    on January 14, 2020 at 3:16 pm

    A "cold Neptune" and two potentially habitable worlds are part of a cache of five newly discovered exoplanets and eight exoplanet candidates found orbiting nearby red dwarf stars, which are reported in The Astrophysical Journal Supplement Series by a team led by Carnegie's Fabo Feng and Paul Butler.

  • NASA's Mars 2020 rover closer to getting its name
    on January 14, 2020 at 12:46 pm

    NASA's Mars 2020 rover is one step closer to having its own name after 155 students across the U.S. were chosen as semifinalists in the "Name the Rover" essay contest. Just one will be selected to win the grand prize—the exciting honor of naming the rover and an invitation to see the spacecraft launch in July 2020 from Cape Canaveral Air Force Station in Florida.