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)

Related

Pages

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

returntotop

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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.

  • Sea creatures store carbon in the ocean – could...
    on April 17, 2019 at 2:10 pm

    As the prospect of catastrophic effects from climate change becomes increasingly likely, a search is on for innovative ways to reduce the risks. One potentially powerful and low-cost strategy is to recognize and protect natural carbon sinks – places and processes that store carbon, keeping it out of Earth's atmosphere. […]

  • What scientists found after sifting through dust...
    on March 12, 2019 at 3:25 pm

    Just as dust gathers in corners and along bookshelves in our homes, dust piles up in space too. But when the dust settles in the solar system, it's often in rings. Several dust rings circle the Sun. The rings trace the orbits of planets, whose gravity tugs dust into place around the Sun, as it drifts by on its way to the center of the solar system. […]

  • Exiled planet linked to stellar flyby three...
    on February 28, 2019 at 2:29 pm

    Some of the peculiar aspects of our solar system—an enveloping cloud of comets, dwarf planets in weird orbits and, if it truly exists, a possible Planet Nine far from the sun—have been linked to the close approach of another star in our system's infancy flung things helter-skelter. […]

  • More support for Planet Nine
    on February 27, 2019 at 5:15 pm

    Corresponding with the three-year anniversary of their announcement hypothesizing the existence of a ninth planet in the solar system, Caltech's Mike Brown and Konstantin Batygin are publishing a pair of papers analyzing the evidence for Planet Nine's existence. […]

  • NASA study reproduces origins of life on ocean...
    on February 26, 2019 at 8:23 am

    Scientists have reproduced in the lab how the ingredients for life could have formed deep in the ocean 4 billion years ago. The results of the new study offer clues to how life started on Earth and where else in the cosmos we might find it. […]