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Kuiper, Gerard Peter

(Encyclopedia) Kuiper, Gerard Peter or Gerrit PieterKuiper, Gerard Peter or Gerrit Pietergĕrˈĭt pēˈtər kīˈpər [key], 1905–73, American astronomer, b. the Netherlands. Kuiper is considered to be the…

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…

Zagreb

(Encyclopedia) ZagrebZagrebzäˈgrĕb [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,…

Tianjin

(Encyclopedia) Tianjin or TientsinTianjinboth: 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,…

July 1999 News and Events

1999 News Month-By-MonthWorldWomen's Groups Challenge Vatican (July 1): Worldwide organizations at U.N. conference attack Vatican efforts to block plan to limit population growth through…

Audible Snowflakes and Other Discoveries

More science highlights discovered in 2000 by Otto Johnson More Discoveries IntroductionIce Age Haute CoutureAntisocial Brain Tissue DeficitNew Orleans, the New Atlantis?First…

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…

Bogotá

(Encyclopedia) Bogotá Bogotá bōgōtäˈ [key], city (2021 metro area est. pop. 11,167,000), central Colombia…

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…