Home > Hypothetical planet

Examples of such hypothetical planets in astronomy or in ancient mythologies include:

1 Sol System

1.1 Planets which would have a direct influence on Earth

• Counter-Earth: An Earth-like planet on Earth's orbit but on the other side of the Sun (hypothesized by the Pythagoreans; used by John Norman as the setting for his Gor novels)
• Theia, a hypothetical planet which was destroyed in a collision with Earth according to the giant impact theory
• Nibiru/ Marduk and Tiamet, two planets from Sumerian mythology which supposedly collided to form Earth (a theory which most scientists find dubious)

1.2 Planets with independent influence

• Planet XSol System planets Planet X (or Transpluto) is a hypothetical planet beyond Pluto. Its existence was argued for on the basis of apparent discrepancies in the orbit of Neptune. A common name for this hypothetical planet is Persephone. Reasons for Planet X' (a tenth planet beyond PlutoPluto is the ninth planet from the Sun in our solar system. Because Pluto is also the smallest planet in our solar system and has a highly eccentric orbit (which takes it inside the orbit of Neptune) there has been some debate regarding whether Pluto shou)
• VulcanVulcan was the name given to a small planet supposed to exist in an orbit between Mercury and the Sun, in a 19th century hypothesis which is now disproved (or at least superseded). Argument for Vulcan's existence Vulcan was proposed to explain a small per, inside the orbit of MercuryMercury is the closest planet to the Sun, and the second-smallest planet in the solar system. Mercury ranges from 0. 5 in apparent magnitude; Mercury is sufficiently "close" to the Sun that telescopes rarely examine it (the greatest elongation is 28. (like Planet X, it was proposed to explain orbital peculiarities)

1.3 Other solar planets

• The Ninth Planet , as originally proposed is not our Pluto, and was found completely by coincidences that Pluto was where the proposed Planet X was supposedly in the sky.
• PhaetonPhaeton is an automobile manufactured by Volkswagen. Phaeton in Greek Mythology is the Son of Helios, the Sun God. 3200 Phaethon is a small asteroid, or possibly a comet with some characteristics normally associated with asteroids. Fragments from this bod, expected to have an orbit between Mars and Jupiter

2 Extra Solar Hypotheticals

• PSR 1829-10PSR 1829-10 is a pulsar located in the Scutum Constellation. This pulsar has been the target of interest because of a mistaken identification of a planet around it. Lyne of the University of Manchester and Bailes claimed in July 1991 to have found a plane's planet, proposed by Andrew G. Lyne of University of ManchesterUniversity of Manchester Motto: Cognitio Sapientia Hvmanitas Knowledge, wisdom, humanity. Established 2004 by the merger of the Victoria University of Manchester (established 1851) and UMIST (established 1824) Co-chancellors Anna Ford and Sir Terry Leahy on July 24 1991, was retracted in 1992. A combination of an inaccurate position for the pulsar and a timing model approximating the Earth's orbit about the Sun with a circle yielded processed data resembling that which would have been expected from a pulsar planet with an orbital period of half a year.
• PSR 1257+12 D , the proposed fourth planet in the first extra solar planetary system, was retracted due to further detection refinements. (It has subsequently been replaced by a proposal for a comet)
• A microlensing event in 1996 of the gravitationally lensed quasar Q0957+561, observed by R. E. Schild in the A lobe of the double imaged quasar, has lead to a controversial, and unconfirmable speculation that a 3 Earth mass planet is possibly in the unknown lensing galaxy, between Earth and the quasar.