Columbia Encyclopedia

Search results

500 results found

urinary system

(Encyclopedia)CE5 Urinary system urinary system, group of organs of the body concerned with excretion of urine, that is, water and the waste products of metabolism. In humans, the kidneys are two small organs s...

Bertillon system

(Encyclopedia)Bertillon system bərtĭlˈyən [key], first scientific method of criminal identification, developed by the French criminologist Alphonse Bertillon (1853–1914). The system, based on the classificati...

exoplanet

(Encyclopedia)exoplanet or extrasolar planet, a planet located outside the solar system. See planet; planetary system. ...

tidal theory

(Encyclopedia)tidal theory: see solar system.

protoplanet theory

(Encyclopedia)protoplanet theory: see solar system. ...

nebular hypothesis

(Encyclopedia)nebular hypothesis: see solar system. ...

encounter theory

(Encyclopedia)encounter theory, in astronomy, see solar system. ...

Kitt Peak National Observatory

(Encyclopedia)Kitt Peak National Observatory, astronomical observatory located southwest of Tucson, Ariz.; it was founded in 1958 under contract with the National Science Foundation and is administered by the Assoc...

Haleakala Observatories

(Encyclopedia)Haleakala Observatories häˌlāäˌkäläˈ [key], astronomical facilities located on the summit of Haleakala volcano, 10,023 ft (3,055 m), in Haleakala National Park, Maui island, Hawaii. Because of...

planetesimal theory

(Encyclopedia)planetesimal theory plănˌĭtĕsˈəməl [key]: see solar system. ...