16K views · 945 reactions | On this day in 1930, Pluto was discovered at the Lowell Observatory in Flagstaff, Arizona, by astronomer Clyde W. Tombaugh. Pluto was once believed to be the ninth planet, but in 2006 it was reclassified as a "dwarf planet." Pluto got its name from an 11-year-old girl from England, according to NASA - National Aeronautics and Space Administration. #TBT #ThrowbackThursday | CNN Business | Facebook
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16K views · 945 reactions | On this day in 1930, Pluto was discovered …
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EarthSky | February 18, 1930: Clyde Tombaugh discovers Pluto
EarthSky | February 18, 1930: Clyde Tombaugh discovers Pluto
Feb 17, 2022
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In 1930, amateur astronomer Clyde Tombaugh discovered Pluto using a telescope, photographic plates of the solar system, and a tool called a blink comparator. You can see a blink comparator and Pluto discovery plate on display in the "Kenneth C. Griffin Exploring the Planets Gallery" at the Museum in DC. This video series is made possible by the generous support of Lockheed Martin. | National Air and Space Museum, Smithsonian Institution
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3.7K views · 753 reactions | Clyde Tombaugh discovered Pluto on this date in 1930. He first glimpsed it as a dot — now we know it as a world. This sequence of images shows how our view changed over the decades, culminating in the New Horizons flyby in 2015. Details: go.nasa.gov/2P6kUxN | NASA Solar System Exploration | Facebook
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Pluto's story began a generation ago when Clyde Tombaugh was tasked to look for Planet X, according to NASA - National Aeronautics and Space Administration http://www.nasa.gov/press-release/nasas-three-billion-mile-journey-to-pluto-reaches-historic-encounter | BuzzFeed News
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186K views · 1.2K shares | Zoom in! Center left of Pluto’s vast...
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