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Mars, in astronomy

(Encyclopedia)Mars, in astronomy, 4th planet from the sun, with an orbit next in order beyond that of the earth. Mars has two natural satellites, discovered by Asaph Hall in 1877. The innermost of these, Phobos...

tennis

(Encyclopedia)CE5 Tennis court tennis, game played indoors or outdoors by two players (singles) or four players (doubles) on a level court. In 1900 the international team competition known as the Davis Cup t...

State, United States Department of

(Encyclopedia)State, United States Department of, executive department of the federal government responsible, under the President's direction, for the making and execution of American foreign policy. Before and ...

modern architecture

(Encyclopedia)modern architecture, new architectural style that emerged in many Western countries in the decade after World War I. It was based on the “rational” use of modern materials, the principles of funct...

Lithuania

(Encyclopedia)CE5 Lithuania lĭtho͞oāˈnēə [key], Lithuanian Lietuva, officially Republic of Lithuania, republic (2015 est. pop. 2,932,000), 25,174 sq mi (65,201 sq km), N central Europe. Lithuania borders o...

agriculture

(Encyclopedia)agriculture, science and practice of producing crops and livestock from the natural resources of the earth. The primary aim of agriculture is to cause the land to produce more abundantly and at the sa...

Antarctica

(Encyclopedia)CE5 Antarctica ăntärkˈtĭkə, –ärˈtĭkə [key], the fifth largest continent, c.5,500,000 sq mi (14,245,000 sq km), asymmetrically centered on the South Pole and almost entirely within the An...

cold war

(Encyclopedia)cold war, term used to describe the shifting struggle for power and prestige between the Western powers and the Communist bloc from the end of World War II until 1989. Of worldwide proportions, the co...

radio

(Encyclopedia)CE5 A. AM transmitter B. AM receiver radio, transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially...

Estonia

(Encyclopedia)CE5 Estonia ĕstōˈnēə [key], Estonian Eesti, officially Republic of Estonia, republic ...