14 Planet Theory

The 14 Planet Theory was a theory by the ArcHivist Farazea, which was supported and cited by ArcHivist Hegelia in her CyberHive. It was through this theory that Farazea explained that Sol's solar system originally contained fourteen planets, up to Planet 14, whilst 20th century Earth humans believed there to be only nine. By the order of the 14 Planet Theory, the planets were Mercury and the Moon, Venus, Mondas, Earth, Mars, Asteris, Jupiter, Saturn, Uranus, Neptune, Pluto, Charon and Planet 14.

Theory
Noting the similarities in composition and size between Mercury and what would become Earth's Moon, Farazea suggested that the future moon, the fourteenth planet in the solar system by what might have been ancient Mondasian reckoning, originally formed as a twin planet to Mercury before being dislodged from its orbit, sending it on a course which led it to close in on the twin planets of Mondas, Planet 4 in the ancient cosmology, and Earth, Planet 5. This resulted in Mercury's twin being caught in Earth's gravity and becoming its moon, whilst Mondas was displaced from its orbit and fell on a course to the edge of the solar system.

The solar system's asteroid belt was thought by many cosmologists and corroborated by evidence in Image of the Fendahl to be the remains of an ancient planet, which Farazea refered to it as Asteris. Just prior to the return of Mondas in the 20th century, Earth cosmologists were engaged in an observation of the skies to find Planet 10, not Mondas, but a body beyond Pluto in order to explain the perturbed orbits of the outer planets. Pluto's own moon, Charon, which observed by the ArcHivists to be so relatively large that together they might have been described as double planets. By 20th century Earth assumptions, the solar system could be said to have contained, with Mondas, Asteris and Planet 10, twelve planets. Including the cometary cloud, the solar system extended to a distance of about 1 and a half light-years or 40 billion miles from Sol. As Pluto was just over 3 and a half billion miles from Sol, the expanse which remained under solar influence could be said to have contained at least one more substantial body that may have been called a planet, Planet 14. (AUDIO: Origins of the Cybermen)