Planet 9
Type: Concept
As of November 2026, Planet 9 has been mentioned in one podcast episode on Dr. Becky (Aug 2025).
Planet Nine is a hypothetical ninth planet in the outer region of the Solar System. Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs)—bodies beyond Neptune that orbit the Sun at distances averaging more than 250 astronomical units (AU). These ETNOs tend to make their closest approaches to the Sun in one sector, and their orbits are similarly tilted. These alignments suggest that an undiscovered planet may be shepherdi
| Mentioned in | 1 episode on 1 podcast (as of November 2026) |
|---|---|
| First heard | Aug 2025 on Dr. Becky |
Who talks about Planet 9 on podcasts?
Planet 9 came up; the most recent mention was Aug 2025 on Dr. Becky.
What is Planet 9 mentioned alongside?
Planet 9 is most often mentioned alongside Ground News, James Webb Space Telescope and Dr. Becky Smith.
Mentioned together: Ground News, James Webb Space Telescope, Dr. Becky Smith, JUICE, LIGO, Michelle Dockati, Fowl and Collaborators, VA83, Ammonite, Swift-Tuttle