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corona, in astronomy

(Encyclopedia)corona, luminous envelope surrounding the sun, outside the chromosphere. Its density is less than one billionth that of the earth's atmosphere. The corona is visible only at the time of totality durin...

phase, in astronomy

(Encyclopedia)CE5 Phases of the moon phase, in astronomy, the measure of how much of the illuminated surface of a planet or satellite can be seen from a point at a distance from that body; the term is most ofte...

Sturges, Preston

(Encyclopedia)Sturges, Preston stûrˈjĭs [key], 1898–1959, American film director, screenwriter, and producer, b. Chicago as Edmond Preston Biden. Educated in the United States and Europe, he turned to playwrit...

FitzRoy, Robert

(Encyclopedia)FitzRoy, Robert, 1805–65, British naval officer, meteorologist, and hydrologist. Given (1829) temporary command of the HMS Beagle, he completed a survey of the coasts of Patagonia and Tierra del Fue...

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