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It is probably composed of the same materials as the ice giants, like hydrogen, helium, methane, water, and ammonia. It is also likely to have a simple ring system similar to that of Neptune's. Because of its distance from the Sun, it is hypothesized that a year on Planet 9 would take around 20,000 years! |
It is probably composed of the same materials as the ice giants, like hydrogen, helium, methane, water, and ammonia. It is also likely to have a simple ring system similar to that of Neptune's. Because of its distance from the Sun, it is hypothesized that a year on Planet 9 would take around 20,000 years! |
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| + | == Origins == |
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| + | It is still unclear how Planet 9 could have gotten into the outer Solar System. |
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| + | Many theories suggest that Planet 9 could've been ejected into the Oort Cloud during the rapid migration of Neptune and the ejection of the Fifth Giant, while others suggest that Planet 9 could be a rogue exoplanet that was captured by the Sun in the past. |
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| + | == Evidence == |
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| + | Recently, scientists observed clustering of objects beyond Neptune's orbit, and that something large was affecting their stability. |
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| + | This led to the theory of a ninth planet existing in the outermost edges of the Kuiper Belt, but no such planet was found. |
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| + | Later, scientists theorized that Planet 9 could be a '''black hole'''. But this theory isn't widely accepted.<br /> |
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[[Category:Gas Giants]] |
[[Category:Gas Giants]] |
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[[Category:Hypothetical Bodies]] |
[[Category:Hypothetical Bodies]] |
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Revision as of 00:22, 28 July 2021
| Planet 9 | |
|---|---|
 What Planet 9 would hypothetically look like, depicted here as a dark, Neptune-like with a moon | |
| Name of Planet | Planet 9 |
| Number of Sattelites | Unknown |
| Date of Discovery | Claimed |
| Distance from Sun | Semi-major axis 500.0 (AU) |
| Diameter | 39000 |
| Orbit | Orbital period 11180.34 (years), Semi-major axis 500.0 (AU), Eccentricity 0.25, Inclination 20.0 (degrees), Ascending node 90.0, Argument of pericenter 140.0 (degrees) |
| Position in Solar System | Mean anomaly 104.0 |
| Mass of Planet | 10 Earth mass |
The orbit of 2015 KG163 (right side, in orange) and other extreme detached objects, along with the hypothetical Planet Nine's orbit on the right
Planet 9, or Planet X, is a hypothetical planet hypothesized to exist in the outermost edges of the Solar System, possibly in the Oort Cloud.
It is thought to be somewhere between 20 and 45 kilometers in diameter, probably larger than Earth but smaller than Neptune. Many official names have been suggested for Planet 9, like Ophadamia and Erebus.
It is probably composed of the same materials as the ice giants, like hydrogen, helium, methane, water, and ammonia. It is also likely to have a simple ring system similar to that of Neptune's. Because of its distance from the Sun, it is hypothesized that a year on Planet 9 would take around 20,000 years!
Origins
It is still unclear how Planet 9 could have gotten into the outer Solar System.
Many theories suggest that Planet 9 could've been ejected into the Oort Cloud during the rapid migration of Neptune and the ejection of the Fifth Giant, while others suggest that Planet 9 could be a rogue exoplanet that was captured by the Sun in the past.
Evidence
Recently, scientists observed clustering of objects beyond Neptune's orbit, and that something large was affecting their stability.
This led to the theory of a ninth planet existing in the outermost edges of the Kuiper Belt, but no such planet was found.
Later, scientists theorized that Planet 9 could be a black hole. But this theory isn't widely accepted.