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dark energy
(Encyclopedia)dark energy, repulsive force that opposes the self-attraction of matter (see gravitation) and causes the expansion of the universe to accelerate. The search for dark energy was triggered by the discov...Tianjin
(Encyclopedia)Tianjin or Tientsin both: tyänˈjĭnˈ [key], city and independent municipality (2010 pop. 12,938,224), NE China. In E central Hebei prov., it is a politically independent unit (4,400 sq mi/11,399 sq...Zagreb
(Encyclopedia)Zagreb zäˈgrĕb [key], Ger. Agram, Hung. Zágráb, city (2011 pop. 790,017), capital and largest city of Croatia, on the Sava River. Zagreb is Croatia's largest industrial, manufacturing, and financ...red shift
(Encyclopedia)red shift or redshift, in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the red, or longer wavelength, end of the visible spectrum. The effect...Bogotá
(Encyclopedia)Bogotá bōgōtäˈ [key], city (2021 metro area est. pop. 11,167,000), central Colombia, cap...Canary Islands
(Encyclopedia)Canary Islands, Span. Islas Canarias, group of seven islands (2020 est. pop. 2,161,000), 2,875 sq mi (7,445 sq km), autonomous community of Spain, ...Vesuvius
(Encyclopedia)Vesuvius vəso͞oˈvēəs [key], Ital. Vesuvio, active volcano, S Italy, on the eastern shore of the Bay of Naples, SE of Naples. The only other active volcano on the European mainland is the Campi Fl...neutrino astronomy
(Encyclopedia)neutrino astronomy, study of stars by means of their emission of neutrinos, fundamental particles that result from nuclear reactions and are emitted by stars along with light. Approximately 100 billio...Hangzhou
(Encyclopedia)Hangzhou hăngˈchou [key], city (1994 est. pop. 1,184,300), capital of Zhejiang prov., E China. It is on the Fuchun River at the head of Hangzhou Bay and handles river traffic through its port. It is...Colombo
(Encyclopedia)Colombo kəlŭmˈbō [key], largest city (2021 est. metro area pop. 619,000) and former capi...Browse by Subject
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