In case you’re keeping track, everyone’s favorite ex-planet (or still 9th planet) was discovered 95 years ago on February 18, 1930.
- “The tiny planet-not-planet that could: Pluto was discovered 95 years ago today.” USA Today. February 18, 2025.
- Editors of EarthSky. “February 18, 1930: Clyde Tombaugh discovers Pluto.” EarthSky. February 18, 2025.
- Amir Alexander, “Pluto: The Discovery of a Planet.” The Planetary Society. February 18, 2025.
- History.com Editors. “Pluto discovered, February 18, 1930.” This Day in History, History.com. Updated February 16, 2024.
- “Discovering Pluto.” FAS Astronomers Blog. February 2020.
- “Pluto and the Outer Solar System.” FAS Astronomers Blog. April 2021.
- “Reclassifying Pluto.” FAS Astronomers Blog. December 2021.
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