1930 in science

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February 18 - While studying photographs taken in January, Clyde Tombaugh discovers Pluto.

March 19 - Karl Wilhelm Reinmuth discovers a main asteroid belt (1164 Kobolda) orbiting the sun every 4 years, from the Landessternwarte Heidelberg-Königstuhl Observatory at Heidelberg, Germany.

April 6 - Hostess Twinkies are invented.

December 24 - In London, Harry Grindell Matthews demonstrates his device to project pictures to the clouds.


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