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scalar

(Encyclopedia)scalar, quantity or number possessing only sign and magnitude, e.g., the real numbers (see number), in contrast to vectors and tensors; scalars obey the rules of elementary algebra. Many physical quan...

Abbot, Charles Greeley

(Encyclopedia)Abbot, Charles Greeley, 1872–1973, American astrophysicist, b. Wilton, N.H. He was acting director in 1896 and director in 1907 of the astrophysical observatory of the Smithsonian Institution; he wa...

Brahic, André Fernand

(Encyclopedia)Brahic, André Fernand, 1942–2016, French astrophysicist, b. Paris. He was introduced to astrophysics by Evry Schatzman, a leading French theoretician, and obtained his doctorate from the Univ. of P...

maser

(Encyclopedia)maser māˈzər [key], device for creation, amplification, and transmission of an intense, highly focused beam of high-frequency radio waves. The name maser is an acronym for microwave amplification b...

gamma-ray astronomy

(Encyclopedia)gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic than X rays (see...

Kennewick

(Encyclopedia)Kennewick kĕnˈəwĭk [key], city (1990 pop. 42,155), Benton co., SE Wash., on the Columbia River near the influx of the Snake River, in an irrigated farm and vineyard region; inc. 1904. With Richlan...

Mayer, Julius Robert von

(Encyclopedia)Mayer, Julius Robert von, 1814–78, German physician and physicist, studied medicine at Tübingen, Munich, and Paris. From a consideration of the generation of animal heat, he was led to determine th...

Hebrew University

(Encyclopedia)Hebrew University of Jerusalem, at Mt. Scopus, Givat Ram, Ein Karem, and Rehovot, Israel; coeducational. First proposed in 1882, formally opened 1925. It is the world's largest Jewish university and i...

Espoo

(Encyclopedia)Espoo ĕsˈpô [key], Swed. Esbo, city, Southern Finland prov., S Finland, 10 mi (16 km) W of...

Elssler, Fanny

(Encyclopedia)Elssler, Fanny fäˈnē ĕlˈslər [key], 1810–84, Austrian dancer. The youngest daughter of Johann Elssler, copyist and valet of Haydn, she made her debut (1833) in London. She danced at the Paris ...