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Dione, in astronomy

(Encyclopedia)Dione dīōˈnē [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IV (or S4), Dione is 695 mi (1,120 km) in diameter, orbits Saturn at a mean distanc...

Fellini, Federico

(Encyclopedia)Fellini, Federico fādārēˈkō fāl-lēˈnē [key], 1920–93, Italian film director. After World War II he wrote screenplays for such neorealistic films as Rossellini's Open City and Paisan. He beg...

Alexie, Sherman

(Encyclopedia)Alexie, Sherman (Sherman Joseph Alexie, Jr.), 1966–, Native American writer, b. Wellpinit, Spokane Indian Reservation, E Wash., studied Gonzaga Univ. and Washington State Univ. (B.A., 1991). Alexie ...

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...

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...

Joshua, book of the Bible

(Encyclopedia)Joshua jŏshˈo͞oə [key], book of the Bible. It is the first book of the Deuteronomic history (Joshua–2 Kings), in which the theological outlook of the Book of Deuteronomy is used to explain the f...

Sirius

(Encyclopedia)Sirius sĭrˈēəs [key], or Dog Star, brightest star in the sky. It is located in the constellation Canis Major (1992 position R.A. 6h44.8m, Dec. −16°42′); its Bayer designation is Alpha Canis M...

Brahe, Tycho

(Encyclopedia)Brahe, Tycho tīˈkō brä [key], 1546–1601, Danish astronomer. The most prominent astronomer of the late 16th cent., he paved the way for future discoveries by improving instruments and by his prec...

time , sequential arrangement of all events

(Encyclopedia)time, sequential arrangement of all events, or the interval between two events in such a sequence. The concept of time may be discussed on several different levels: physical, psychological, philosophi...

geophysics

(Encyclopedia)geophysics, study of the structure, composition, and dynamic changes of the earth, its atmosphere, hydrosphere and magnetosphere, based on the principles of physics. The term was probably first used i...