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Bessel, Friedrich Wilhelm

(Encyclopedia)Bessel, Friedrich Wilhelm frēdˈrĭkh vĭlˈhĕlm bĕsˈəl [key], 1784–1846, German astronomer and mathematician. He became (1810) director of the new observatory at Königsberg and professor of a...

Odessa, city, Ukraine

(Encyclopedia)Odessa , Rus. ədyĕˈsə [key], Ukr. Odesa, city (1989 pop. 1,115,000), capital of Odessa region, in Ukraine, a port on Odessa Bay of the Black Sea. The third largest Ukrainian city after Kiev and Kh...

Le Verrier, Urbain Jean Joseph

(Encyclopedia)Le Verrier, Urbain Jean Joseph ürbăNˈ zhäN zhôzĕfˈ ləvĕryāˈ [key], 1811–77, French astronomer who made calculations that led to the discovery of the planet Neptune. In considering the per...

Giacconi, Riccardo

(Encyclopedia)Giacconi, Riccardo, 1931–2018, Italian-American astrophysicist, b. Milan, Italy, Ph.D. Univ. of Milan 1954. He was a researcher at American Science and Engineering Corporation (1959–73), professor...

Herzberg, Gerhard

(Encyclopedia)Herzberg, Gerhard gĕrˈhärt hûrtsˈbûrg [key], 1904–99, Canadian physicist, b. Hamburg, Germany. He studied at Darmstadt, Göttingen, and Bristol, England, receiving a doctorate in engineering p...

Antananarivo

(Encyclopedia)Antananarivo tänänärēvˈ [key], city (2021 metro. area pop. 3,531,887), capital of Madagascar. Antananarivo is Madagascar's largest city and is its administrative, com...

Canberra

(Encyclopedia)Canberra kănˈbərə [key], city (2020 pop. 457,000), capital of Australia, in the Australian Capital Territory, SE ...

Qingdao

(Encyclopedia)Qingdao tsĭngˈtouˈ, chĭngˈdouˈ [key], city (1994 est. pop. 1,584,100), SE Shandong prov., E China, on the Yellow Sea. With an excellent ice-free harbor, it is a major fishing and trade port of C...

black hole

(Encyclopedia)black hole, in astronomy, celestial object of such extremely intense gravity that it attracts everything near it and in some instances prevents everything, including light, from escaping. The term was...

longitude

(Encyclopedia)longitude lŏnˈjĭto͞odˌ [key], angular distance on the earth's surface measured along any latitude line such as the equator east or west of the prime meridian. A meridian of longitude is an imagin...