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Bookmark or Share- In Depth | Hypothetical Planet X - NASA Solar System ExplorationCaltech researchers have found mathematical evidence suggesting there may be a "Planet X" deep in the solar system. This hypothetical Neptune-sized planet orbits our Sun in a highly elongated orbit far beyond Pluto.
- Everything you need to know about Planet X: The mysterious ...Everything you need to know about Planet X: The mysterious 9th planet - Interesting Engineering. Research suggests our solar system has another large planet. Does it, or did it ever, exist?...
- The Case Strengthens for Planet 9 | News | AstrobiologySome call the potential celestial object Planet X and some call it Planet 9 — as in, the ninth planet in our solar system now that Pluto has been demoted to a dwarf planet. But by any name, the interest is clearly high.
- Hypothetical Planet X - NASA ScienceOverview. Caltech researchers have found mathematical evidence suggesting there may be a "Planet X" deep in the solar system. This hypothetical Neptune-sized planet orbits our Sun in a highly elongated orbit far beyond Pluto.
- Planets beyond Neptune - WikipediaWhile the astronomical community widely agrees that Planet X, as originally envisioned, does not exist, the concept of an as-yet-unobserved planet has been revived by a number of astronomers to explain other anomalies observed in the outer Solar System.
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