Cecilia Payne-Gaposchkin, English-American astronomer and astrophysicist (b. 1900)
Cecilia Helena Payne-Gaposchkin (née Payne; (1900-05-10)May 10, 1900 – (1979-12-07)December 7, 1979) was a British-born American astronomer and astrophysicist who proposed in her 1925 doctoral thesis that stars were composed primarily of hydrogen and helium. Her groundbreaking conclusion was initially rejected because it contradicted the scientific wisdom of the time, which held that there were no significant elemental differences between the Sun and Earth. Independent observations eventually proved she was correct. Her work on the nature of variable stars, carried out with her husband, Sergei Gaposchkin, were foundational to modern astrophysics.
1979Dec, 7
Cecilia Payne-Gaposchkin
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Events on 1979
- 1Feb
Ruhollah Khomeini
Iranian Ayatollah Ruhollah Khomeini returns to Tehran after nearly 15 years of exile. - 11Feb
Ruhollah Khomeini
The Iranian Revolution establishes an Islamic theocracy under the leadership of Ayatollah Ruhollah Khomeini. - 16Mar
People's Liberation Army
Sino-Vietnamese War: The People's Liberation Army crosses the border back into China, ends the war. - 15Jul
Malaise speech
U.S. President Jimmy Carter gives his "malaise speech". - 16Dec
OPEC
Libya joins four other OPEC nations in raising crude oil prices, which has an immediate, dramatic effect on the United States.