This page is a work in progress!
Hypothetical Bodies are bodies that have not yet been discovered, but are thought to exist for certain reasons to explain phenomena across are solar system that has not been explained yet. Some hypothetical planets are false, due to being disproven to exist.
List[]
Here is a list of the most known Hypothetical bodies.
Hypothetical Planets[]
| Name of Hypothetical Planet | Distance from Sun (in kilometers) | Diameter in kilometers | Reason Hypothesized |
|---|---|---|---|
| Vulcan | 885 139,2 km | 3,500 km | To explain perturbations in Mercury’s orbit. |
| Antichthon | 150 000 000 km | 12,742 km | To support Philolaus' non-geocentric cosmology, in which all objects in the universe revolve around a "Central Fire" (unseen from Earth and distinct from the Sun which also revolves around it). |
| Nibiru | 150 000 000 km | 18,000 km | End of mayan calendar at December 21, 2012.(?) |
| Theia | 152 887 680 km | 6,950 km | To explain the creation of the moon. |
| Phaeton | 321 868 800 km | 5,560 km | To explain the creation and existence of the asteroid belt. |
| Fifth Giant | 2 209 629 312 km | 46,500 km | Reproduces a number of aspects of the current Solar System. |
| Planet 9 | 148 059 648 000 km | 48,200 km | To explain the strange orbits of comets and TNOs with large orbits (Like Sedna) |
| Planet 10 | 852952320000 | 6,474 | Same as Planet 9. |
| Tyche | 2 243 968 065 000 km | 160,000 km | Whitemire states that Tyche dislodges long-period comets from the Oort Cloud and Tyche may also the tilted orbits of 2006 SQ372 and Sedna, although this is still inconclusive. |
| Nemesis | 950 billion miles | 300,000 | To explain a perceived cycle of mass extinctions in the geological record, which seem to occur more often at intervals of 26 million years. |
| Enyo and Bellona | ? | ? | To explain where Mars, the Moon, Pluto, and the other dwarf planets and the formation of Earth, Venus, Mercury, asteroid belt, and comets. |
Hypothetical Moons[]
Hypothetical moons are moons that have not yet been discovered, some hypothetical moons are false, due to being disproven to exist.
Here is a list of the Hypothetical moons.
| Name of Hypothetical Moon | Parent Planet | Distance from Parent Planet | Diameter in kilometers | Reason Hypothesized |
|---|---|---|---|---|
| Hermes | Mercury | N/A | N/A | None, but turned out to be misinterpreted data from a star, 31 Crateris. |
| Caduceus | Mercury | N/A | N/A | NASA claimed that this moon existed as an April Fools joke. |
| Neith | Venus | N/A | Around 3026 km (¼ of Venus' diameter. | Reportedly sighted by Giovanni Cassini in 1672. |
| Petit's moon | Earth | N/A | N/A | First major claim of another moon of Earth made by French astronomer Frédéric Petit. |
| Waltemath's moons | Earth | N/A | N/A | Unknown. |
| Chiron | Saturn | N/A | N/A | Thought to be orbiting between Titan and Hyperion. |
| Themis | Saturn | 1,456,456 km | Estimated to be 61 km | Reportedly found by astronomers. |
| Nibiru I | Nibiru | 1300-2000 km | N/A | Reportedly seen in telescope |
| Sedna I | Sedna | N/A | N/A | To explain Sedna’s slow rotation. Later disproven as better data said that the rotation was only 10 hours. |
| Hypothetical Bodies in the Solar System | ||
|---|---|---|
| Hypothetical Planets | Inner Solar System | Vulcan • Counter-Earth • Nibiru • Theia • Phaeton • Enyo and Bellona • Krypton |
| Outer Solar System | Fifth Giant • Unnamed ancient Super-earth • Triton’s Binary Partner • Planet 9 • Planet 10 • Tyche • Nemesis | |
| Hypothetical Moons | Inner Solar System | Disproven Moons of Mercury • Neith • Petit's moon • Waltemath's moons • Moons of Pallas • Moon of Hebe |
| Outer Solar System | Chiron • Chrysalis • Themis • Sedna I • Varuna I • Herschel's Moons | |
| Other Hypothetical Objects | Hypothetical Regions | Vulcanoid Belt • Hills Cloud • Oort Cloud |
| Hypotheses for Explanation of Occurrences | Hypotheses | Giant impact hypothesis • Himalia Crash Theory |