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astronomy

(Encyclopedia)astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets, stars, and galaxies; more generally, the study of matter and energy in the universe at large. ...

Chordata

(Encyclopedia)CE5 Common features in representative groups of the phylum Chordata Chordata kôrdāˈtə, –däˈ– [key], phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal ...

Iraq

(Encyclopedia)CE5 Iraq or Irak both: ēräkˈ, ĭrăkˈ [key], officially Republic of Iraq, republic (2005 est. pop. 26,075,000), 167,924 sq mi (434,924 sq km), SW Asia. Iraq is bordered on the south by Kuwait, ...

Chile

(Encyclopedia)CE5 Chile chĭlˈē, Span. chēˈlā [key], officially Republic of Chile, republic (2020 est. pop. 19,116,201), ...

Libya

(Encyclopedia)CE5 Libya lĭbˈēə [key], republic (2015 est. pop. 6,235,000), 679,358 sq mi (1,759,540 sq km), N Africa. It borders on Algeria in the west, on Tunisia in the northwest, on the Mediterranean Sea ...

Italy

(Encyclopedia)CE5 Italy ĭtˈəlē [key], Ital. Italia, officially Italian Republic, republic (2015 est. pop. 59,504,000), 116,303 sq mi (301,225 sq km), S Europe. It borders on France in the northwest, the Ligu...

United Nations

(Encyclopedia)CE5 CE5 United Nations (UN), international organization established immediately after World War II. It replaced the League of Nations. In 1945, when the UN was founded, there were 51 members; 193...

Germany

(Encyclopedia)CE5 Germany jûrˈmənē [key], Ger. Deutschland, officially Federal Republic of Germany, ...

Argentina

(Encyclopedia)CE5 Argentina ärjəntēˈnə, Span. ärhāntēˈnä [key], officially Argentine Republic, republic (2020 est. pop. 45,380,000), 1,072,157 sq mi (2,776,889 sq k...

Union of Soviet Socialist Republics

(Encyclopedia)Union of Soviet Socialist Republics (USSR), Rus. Soyuz Sovetskikh Sotsialisticheskikh Respublik, former republic. It was established in 1922 and dissolved in 1991. The Soviet Union was the first state...