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  1. Charles Greeley Abbot (May 31, 1872 – December 17, 1973) was an American astrophysicist and the fifth secretary of the Smithsonian Institution, serving from 1928 until 1944.

  2. May 27, 2024 · Charles Greeley Abbot was an American astrophysicist who, as director of the Smithsonian Astrophysical Observatory in Washington, D.C., for almost four decades, engaged in a career-long campaign to demonstrate that the Sun’s energy output varies and has a measurable effect on the Earth’s weather.

  3. The fifth Smithsonian Secretary, Charles Greeley Abbot, served from 1928 to 1944, and was the first Secretary to retire from office. An astrophysicist who studied solar radiation, Abbot was born in Wilton, New Hampshire, into a family of farmers.

  4. Abbot was first and foremost an observational astronomer. Under his direction the SAO established four solar-observing stations around the world to fulfill one of its primary tasks: study of the solar constant, which is the intensity of solar radiation above the earth's atmosphere.

  5. Charles Greeley Abbot was an American astrophysicist, best known for his research in the field of solar energy. His talent was evident from a young age; he built and invented numerous things, such as a forge to fix tools, a water wheel to power a saw, and a bicycle.

  6. www.nasonline.org › 2024 › 06Charles Abbot

    C HARLES GREELEY ABBOT was the second director of the Smithsonian Astrophysical Observatory and the fifth Secretary of the Smithsonian Institution.

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  8. CHARLES GREELEY ABBOT was the second director of the Smithsonian Astrophysical Observatory and the fifth Secretary of the Smithsonian Institution. He was the second and last person to hold both posts simultaneously and is remembered today for his skill as an instrumentalist and his unshakable belief that the Sun is a variable star and that its ...

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