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airport

(Encyclopedia)airport or airfield, place for landing and departure of aircraft, usually with facilities for housing and maintaining planes and for receiving and discharging passengers and cargo. There are about 16,...

observatory

(Encyclopedia)observatory, scientific facility especially equipped to detect and record naturally occurring scientific phenomena. Although geological and meteorological observatories exist, the term is generally ap...

gamma-ray astronomy

(Encyclopedia)gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic than X rays (see...

Kroemer, Herbert

(Encyclopedia)Kroemer, Herbert, 1928–, German physicist, Ph.D. Univ. of Göttingen, 1952. Kroemer was a researcher at RCA Laboratories in Princeton, N.J. (1954–57), and at Varian Associates in Palo Alto, Calif....

Mather, John Cromwell

(Encyclopedia)Mather, John Cromwell, 1946–, American astrophysicist, b. Roanoke, Va., Ph.D. Univ. of California, Berkeley, 1974. He has been a researcher at NASA's Goddard Space Flight Center in Greenbelt, Md., s...

climate

(Encyclopedia)climate, average condition of the atmosphere near the earth's surface over a long period of time, taking into account temperature, precipitation (see rain), humidity, wind, barometric pressure, and ot...

Hazen, William Babcock

(Encyclopedia)Hazen, William Babcock, 1830–87, American general, b. West Hartford, near Hartford, Vt. In the Civil War he fought at Shiloh, Perryville, and Murfreesboro, and in the Chattanooga campaign. Promoted ...

Hoche, Louis Lazare

(Encyclopedia)Hoche, Louis Lazare läzärˈ ôsh [key], 1768–97, French general in the French Revolutionary Wars. He entered the army at the age of 16 and rose rapidly to lieutenant in the national guard by 1792....

Pérez, Juan

(Encyclopedia)Pérez, Juan hwän pāˈrāth [key], d. 1774, Spanish colonial naval officer, explorer on the coast of the Pacific Northwest. In 1774 he commanded a fleet sent by the Spanish viceroy to investigate Ru...

lespedeza

(Encyclopedia)lespedeza lĕsˌpədēˈzə [key] or bush clover, any plant of the genus Lespedeza, leguminous herbs or undershrubs of the family Leguminosae (pulse family); native to North America, Asia, and Austral...