The National Space and Aeronautics Administration publishes news about the solar system and space exploration on its social media accounts, such as the official N.A.S.A. blog, Twitter and Facebook. The NASA website, nasa.gov, also includes detailed information on dwarf planets, the Kuiper belt and extrasolar bodies. For information on the Planet X-Nibiru Cataclysm hoax, check PlanetXNews.com.
A number of celestial bodies orbit the sun at a greater distance than Neptune, including the dwarf planets Eris, Haumea, Makemake and Pluto. They are barren rocks with atmospheres composed primarily of nitrogen and methane. These dwarf planets are part of the Kuiper belt, a ring of icy debris that encircles the solar system.
Theories about Planet X, a large hypothetical planet beyond Neptune, originated with the search for Pluto in the mid-19th century. Astronomers hoped to explain irregularities in Uranus and Neptune's orbits with the discovery of a planet large enough to distort those orbits. However, the perceived irregularities were due to a miscalculation of Neptune's mass, and not any other large planet.
Since then, Planet X remains in the public consciousness as part of conspiracy theories and hoaxes, most notably in the 2012 Nibiru Cataclysm hoax. Conspiracy theorist alleged Planet X, or Nibiru, was approaching Earth and threatened to destroy it. NASA debunked this and other 2012 doomsday theories in a 2012 article "Beyond 2012: Why the World Didn't End."