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1. • 1928

     • In June of 1928, using his recently completed 9 inch reflecting telescope, Clyde drew detailed pictures of the surfaces of Mars and Jupiter.
     www.planetary.org/articles/pluto-discovery-4

     The Discovery of a Planet, Part 4: Clyde's… | The Planetary ...

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   What telescope did Clyde Tombaugh use?

   • The Pluto Telescope The 13-inch Abbott Lawrence Lowell Telescope used by Clyde Tombaugh in his discovery of Pluto Image: Lowell Observatory Slipher’s response arrived almost immediately, and a brief correspondence ensued. “Are you in good physical health” Slipher asked Tombaugh, who began to suspect that the interest in him was more than academic.

   The Discovery of a Planet, Part 4: Clyde's Search - The Planetary Society

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   What did Clyde Tombaugh discover?

   • Clyde Tombaugh photographed 65% of the sky and spent thousands of hours examining photographs of the night sky. After ten months of very hard work, sometimes working through the night in an unheated dome, Clyde Tombaugh discovered an object he named Pluto. For many years, Pluto was considered to be the ninth planet in our solar system.

   Clyde Tombaugh - NASA

   starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/tombaugh.html

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   How did Clyde Tombaugh discover Pluto?

   • The Pluto Discovery Plates The photographic plates, taken 6 days apart with the 13 inch telescope, with which Clyde Tombaugh discovered Pluto. The arrows point to the position of Pluto on each of the two days. Image: Lowell Observatory Archives By the spring of 1929 Clyde Tombaugh had his system well in hand.

   The Discovery of a Planet, Part 4: Clyde's Search - The Planetary Society

   www.planetary.org/articles/pluto-discovery-4

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   Did Clyde build a telescope?

   • The telescope Clyde built in 1925 was only the first of more than thirty telescopes he was to build over his lifetime. In 1928 Clyde completed the construction of a very accurate 23-centimeter reflector. The mount for this telescope was built from part of the crankshaft from a 1910 Buick and discarded parts from a cream separator!

   Clyde Tombaugh - NASA

   starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/tombaugh.html

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3. en.wikipedia.org › wiki › Clyde_TombaughClyde Tombaugh - Wikipedia

   en.wikipedia.org › wiki › Clyde_Tombaugh

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   Professor Tombaugh (the one the station was named for) was working on a giant electronic telescope to photograph it, under a Guggenheim grant, but he had a special interest; he discovered Pluto years before I was born.

4. www.space.com › 19824-clyde-tombaughClyde Tombaugh: Astronomer Who Discovered Pluto | Space

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   Feb 15, 2013 · When Tombaugh was hired in 1929, he joined the search for the missing planet. The telescope at the observatory was equipped with a camera that would take two photographs of the sky on different...

5. earthsky.org › space › clyde-tombaugh-discoveredEarthSky | February 18, 1930: Clyde Tombaugh discovers Pluto

   earthsky.org › space › clyde-tombaugh-discovered

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   Feb 18, 2022 · On February 18, 1930, Tombaugh compared photos of a single star field – taken six days apart a few weeks earlier – and noticed an object was moving against the backdrop of stars. It was a...

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7. starchild.gsfc.nasa.gov › tombaughClyde Tombaugh - NASA

   starchild.gsfc.nasa.gov › tombaugh

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   The telescope Clyde built in 1925 was only the first of more than thirty telescopes he was to build over his lifetime. In 1928 Clyde completed the construction of a very accurate 23-centimeter reflector.

8. www.nature.com › articles › naturePluto's long, strange history — in pictures | Nature

   www.nature.com › articles › nature

   Feb 18, 2015 · 18 February 1930: Farmer-turned-astronomer Clyde Tombaugh (pictured), aged 24, discovers Pluto while comparing photographic plates of the night sky at Lowell Observatory in Flagstaff,...

   • Author: Alexandra Witze

   • Publish Year: 2015

9. pluto.jhuapl.edu › Pluto › About-Clyde-TombaughNew Horizons : About Clyde Tombaugh

   pluto.jhuapl.edu › Pluto › About-Clyde-Tombaugh

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   In rural Kansas, Clyde Tombaugh, a young farm boy and amateur astronomer built his own nine-inch telescope with a hand-crafted mirror and discarded parts from farm equipment. With his telescope he viewed the skies and made sketches of details on the planets.

10. www.planetary.org › articles › pluto-discovery-4The Discovery of a Planet, Part 4: Clyde's… | The Planetary ...

    www.planetary.org › articles › pluto-discovery-4

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    In June of 1928, using his recently completed 9 inch reflecting telescope, Clyde drew detailed pictures of the surfaces of Mars and Jupiter. He sent them to Dr. V. M. Slipher, director of the Lowell Observatory, the only professional observatory he had ever heard of.