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electron-volt

(Encyclopedia)electron-volt, abbr. eV, unit of energy used in atomic and nuclear physics; 1 electron-volt is the energy transferred in moving a unit charge, positive or negative and equal to that charge on the elec...

Kahn, Herman

(Encyclopedia)Kahn, Herman kän [key], 1922–83, American military strategist. b. Bayonne, N.J. After graduate work in physics at the California Institute of Technology, he joined the Rand Corporation. Unlike scho...

Kiritimati

(Encyclopedia)Kiritimati kərĭsˈməs [key], largest atoll in the Pacific (1990 pop. 2,537), 222 sq mi (575 sq km), in the Line Islands, one of the island groups that compose the Republic of Kiribati. It was previ...

Carruthers, George Richard

(Encyclopedia) Carruthers, George Richard, 1939-2020, African-American astrophysicist, b. Cincinnati, OH, Univ. of Illinois at Urbana-Champaign (BS, 1961; MS, nuclear...

Castile–La Mancha

(Encyclopedia)Castile–La Mancha kăstēlˈ–lä mänˈchə [key], autonomous community, 30,680 s...

nucleosynthesis

(Encyclopedia)nucleosynthesis or nucleogenesis, in astronomy, production of all the chemical elements from the simplest element, hydrogen, by thermonuclear reactions within stars, supernovas, and in the big bang at...

flerovium

(Encyclopedia)flerovium, artificially produced radioactive chemical element; symbol Fl; at. no. 114; mass number of most stable isotope 289; m.p., b.p., sp. gr., and valence unknown. Situated in Group 14 of the per...

strontium

(Encyclopedia)strontium strŏnˈshēəm [key] [from Strontian, a Scottish town], a metallic chemical element; symbol Sr; at. no. 38; at. wt. 87.62; m.p. 769℃; b.p. 1,384℃; sp. gr. 2.6 at 20℃; valence +2. Stro...

stellar evolution

(Encyclopedia)CE5 The above Hertzsprung-Russell (H-R) diagram shows the track of stellar evolution for a typical star. After spending much of its life evolving toward or along the main sequence, the star becomes...

Lafontaine, Oskar

(Encyclopedia)Lafontaine, Oskar, 1943–, German politician. He rose through the Social Democrat Party (SPD) and electoral ranks in the Saar, becoming SPD regional chairman in 1977 and premier of the Saar in 1985. ...