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| | Charles Greeley Abbot -- Encyclopædia Britannica (Site not responding. Last check: 2007-10-08) |
 | | 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. |
 | | The Smithsonian Astrophysical Observatory was established in 1890 in Washington, D.C., by Samuel Pierpont Langley, the third secretary of the Smithsonian Institution, for the specific study of the Sun's radiation. |
 | | Langley's successor as observatory director in 1906, Charles Greeley Abbot, limited the facility's attention to the study of the amount and character of, and... |
| www.britannica.com /eb/article-9003249 (733 words) |
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