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Ruse

(Encyclopedia)Ruse ro͝oˈsĕ [key], city (1993 pop. 170,209), NE Bulgaria, on the Danube River bordering Romania. The chief river port of Bulgaria, it is also an industrial and communications center; a bridge span...

Ucayali

(Encyclopedia)Ucayali o͞okäyäˈlē [key], river, c.1,000 mi (1,610 km) long, formed by the confluence of the Apurímac and Urubamba rivers, E Peru, and flowing generally north through a mountain and jungle wilde...

Stockton

(Encyclopedia)Stockton, city (1990 pop. 210,943), seat of San Joaquin co., central Calif., on the San Joaquin River; inc. 1850. One of the fastest-growing U.S. cities during the late 20th cent., Stockton is an inla...

Hyperion, in astronomy

(Encyclopedia)Hyperion hīpērˈēən [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn VII (or S7), Hyperion is the largest highly irregular (nonspherical) body in...

Eris, in astronomy

(Encyclopedia)Eris, in astronomy, the largest known dwarf planet. Eris, whose highly eccentric elliptical orbit ranges from 38 AU to 97 AU and is inclined more than 44°, is the largest known object of the Kuiper b...

apsis

(Encyclopedia)CE5 Apsis points, or apsides, in the earth's orbit: At perihelion the earth is closest to the sun and at aphelion it is farthest from the sun. apsis (pl. apsides), point in the orbit of a body whe...

Phoebe, in astronomy

(Encyclopedia)Phoebe fēˈbē [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IX (or S9), Phoebe is 137 mi (220 km) in diameter, orbits Saturn at a mean distance ...

space law

(Encyclopedia)space law, agreements governing the exploration and use of outer space, developed since the first launching (1957) by humans of a satellite into space. Space law, an aspect of international law, has g...

Ban, Shigeru

(Encyclopedia)Ban, Shigeru, 1957–, Japanese architect. After graduating (1984) from the Cooper Union School of Architecture, New York City, he established (1985) a practice in Tokyo, later adding offices in Paris...

Prometheus, in astronomy

(Encyclopedia)Prometheus prōmēˈthēəs [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XVI (or S16), Prometheus is an irregularly shaped (nonspherical) body me...