Why our solar system might contain dozens of hidden planets
In short: While we are taught there are only eight planets, a physics-based approach suggests the count could be much higher. This video explores the forgotten bodies in our neighborhood and what defines a world.
The International Astronomical Union (IAU) officially recognizes only eight planets, but this definition may be too narrow. By applying different physical criteria for what constitutes a planet, scientists estimate there could be at least 40 planets within our solar system—and potentially many more.
The exploration covers diverse celestial bodies including those in the Kuiper Belt and specific objects like Makemake, Haumea (noted for its ring), Lutetia, Hygiea, and the theoretical Planet Nine. Featuring insights from New Horizons principal investigator Alan Stern, the video contextualizes these 'forgotten' worlds as significant subjects of modern astronomy.
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Sources
- Summary by Intellect · source: The Solar System's Forgotten Planets
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