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Van Allen, James Alfred

(Encyclopedia)Van Allen, James Alfred, 1914–2006, American physicist and space scientist, Mt. Pleasant, Iowa. A graduate (Ph.D 1939) of and professor of physics (1951–85) at what is now the Univ. of Iowa, where...

United States Naval Observatory

(Encyclopedia)United States Naval Observatory, a federal astronomical observatory, located in Washington, D. C. It evolved from the Navy's oldest scientific institution, the Depot of Charts and Instruments, founded...

Seeger, Pete

(Encyclopedia)Seeger, Pete (Peter Seeger), 1919–2014, American folksinger, composer, and environmentalist, b. New York City. Seeger, a son of musicologist Charles Seeger and violinist Constance Edson Seeger, step...

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...

organ

(Encyclopedia)CE5 Organ organ, a musical wind instrument in which sound is produced by one or more sets of pipes controlled by a keyboard, each pipe producing only one pitch by means of a mechanically produced ...

Astor, John Jacob, 1763–1848, American merchant

(Encyclopedia)Astor, John Jacob ăsˈtər [key], 1763–1848, American merchant, b. Walldorf, near Heidelberg, Germany. At the age of 16 he went to England, and five years later, in 1784, he arrived in Baltimore, p...

Münzer, Thomas

(Encyclopedia)Münzer or Müntzer, Thomas tōˈmäs münˈtsər [key], c.1489–1525, radical German Protestant reformer. During his studies at Leipzig (1518) Münzer fell under the influence of Martin Luther. On L...

Greenwood

(Encyclopedia)Greenwood.1 City (2020 pop. 9,516 ), seat of Sebastian co., NW Ark.; founded 1851. It was the first county seat for the area, when its original courthou...

geodesy

(Encyclopedia)geodesy jēŏdˈĭsē [key] or geodetic surveying, theory and practice of determining the position of points on the earth's surface and the dimensions of areas so large that the curvature of the earth...