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universe

(Encyclopedia)universe, totality of matter and energy in existence. The study of the origin of the universe, or cosmos, is known as cosmogony, and that of its structure and evolution, cosmology. The age of the univ...

Korolev, Sergei Pavlovich

(Encyclopedia)Korolev, Sergei Pavlovich, 1907–66, Soviet rocket designer. His role as chief designer of the Soviet space program was revealed only after his death. After he successfully launched two intercontinen...

Young, John Watts

(Encyclopedia)Young, John Watts, 1930–2018, American astronaut, b. San Francisco. A Navy test pilot, he joined the National Aeronautics and Space Administration's astronaut program in 1962. Young served as pilot ...

Hydra, in astronomy

(Encyclopedia)Hydra, in astronomy, southern constellation lying S of Corvus, Crater, Virgo, Leo, and Cancer. It is a long, slender, winding constellation traditionally depicted as a snake and known also as the Wate...

Redstone Arsenal

(Encyclopedia)Redstone Arsenal, U.S. rocket research and development center, 38,781 acres (15,694 hectares), N Ala., W of Huntsville; est. 1941. One of the state's largest industrial enterprises, it includes the Ar...

Amici, Giovanni Battista

(Encyclopedia)Amici, Giovanni Battista jōvänˈnē bät-tēsˈtä ämēˈchē [key], 1786–1863, Italian astronomer, mathematician, and naturalist. He became director of the observatory and professor of astronomy...

Praesepe

(Encyclopedia)Praesepe prēsēˈpē [key] [Lat.,=manger], open star cluster in the constellation Cancer; cataloged as M44 or NGC 2632. It was first recorded by Hipparchus (c.150 b.c.). The cluster is often called t...

asteroid

(Encyclopedia)CE5 The asteroid belt lies between the orbits of Mars and Jupiter. Gaps where no asteroids are found are called Kirkwood gaps. The Trojan asteroids share Jupiter's orbit with the planet. asteroid,...

Skylab

(Encyclopedia)Skylab: see space exploration; space station. ...

dimension, in mathematics

(Encyclopedia)dimension, in mathematics, number of parameters or coordinates required locally to describe points in a mathematical object (usually geometric in character). For example, the space we inhabit is three...