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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
- About Us
A Meteoric Career
23 October 1998 7:00 pm
Ernst Öpik, an Estonian astronomer whose wide-ranging work on meteors led to the development of heat shields for spacecraft, was born on this day in 1893. Öpik studied the erosion of meteors as they plunge through an atmosphere. His calculations led to the design of heat shields and other protective devices that enable spacecraft to survive the friction and heat upon reentering Earth's atmosphere.
Earlier in his career, Öpik originated the practice of the "double-count," in which two astronomers simultaneously scan the heavens for meteors to gain a more accurate count of meteors. He also proved that stars depend on nuclear reactions for their energy.
[Source: Roy Porter, Ed., The Biographical Dictionary of Scientists (Oxford University Press, ed. 2, 1994).]