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Spectral Classes for Main Sequence Stars (table)
(Encyclopedia)Characteristics of Spectral Classes for Main Sequence Stars ...low-temperature physics
(Encyclopedia)low-temperature physics, science concerned with the production and maintenance of temperatures much below normal, down to almost absolute zero, and with various phenomena that occur only at such tempe...Swift Current
(Encyclopedia)Swift Current, city (1991 pop. 14,815), SW Sask., Canada, on Swift Current Creek. It is a distribution and processing center for a farm and oil region. Other industries are helium extraction, lumberin...Liberal
(Encyclopedia)Liberal, city (1990 pop. 16,573), seat of Seward co., SW Kans.; founded 1888, inc. 1945. It is the trade center for a grazing and farm area. Oil and natural gas are extracted, and helium is processed ...alpha particle
(Encyclopedia)alpha particle, one of the three types of radiation resulting from natural radioactivity. Alpha radiation (or alpha rays) was distinguished and named by E. R. Rutherford in 1909, who found by measurin...tunneling
(Encyclopedia)tunneling, quantum-mechanical effect by which a particle can penetrate a barrier into a region of space that would be forbidden by ordinary classical mechanics. Tunneling is a direct result of the wav...nonmetal
(Encyclopedia)nonmetal, chemical element possessing certain properties by which it is distinguished from a metal. In general, this distinction is drawn on the basis that a nonmetal tends to accept electrons and for...Kamerlingh Onnes, Heike
(Encyclopedia)Kamerlingh Onnes, Heike hīˈkə käˈmərlĭng ônˈəs [key], 1853–1926, Dutch physicist. He was, from 1882, professor of physics at the Univ. of Leiden. He made important studies of the propertie...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...Ramsay, Sir William
(Encyclopedia)Ramsay, Sir William, 1852–1916, Scottish chemist. He was professor of chemistry at University College, Bristol (1880–87), and at University College, London (1887–1912). In his early experiments ...Browse by Subject
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