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Universalium. 2010.
Hertzsprung-Russell diagram — The Hertzsprung Russell diagram (usually referred to by the abbreviation H R diagram or HRD, also known as a colour magnitude diagram, or CMD) shows the relationship between absolute magnitude, luminosity, classification, and effective… … Wikipedia
Hertzsprung–Russell diagram — ▪ astronomy in astronomy, graph in which the absolute magnitudes (intrinsic brightness) of stars are plotted against their spectral types. Of great importance to theories of stellar evolution, it evolved from charts begun in 1911 by the Danish… … Universalium
colour — /kul euhr/, n., adj. v.t., v.i. Chiefly Brit. color. Usage. See or1. * * * I Aspect of any object that may be described in terms of hue, brightness, and saturation. It is associated with the visible wavelengths of electromagnetic radiation, which … Universalium
B-V colour — B V color is one of the two color indices in the UBV photometric system.Astronomers measure the amount of light a star gives off in different colors. Hot stars give off more blue light than red; cool stars give off more red light than blue.… … Wikipedia
Hertzsprung-Russell diagram — noun a plot of the absolute magnitude of stars versus their colour (or surface temperature); shows the main sequence of stars plus the white dwarfs and red giants … Wiktionary
star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… … Universalium
star cluster — Astron. a number of stars of common origin held together as a group by gravitational attraction. Cf. globular cluster, open cluster, stellar association. * * * ▪ astronomy Introduction either of two general types of stellar assemblages held… … Universalium
Milky Way Galaxy — Large spiral galaxy (roughly 150,000 light years in diameter) that contains Earth s solar system. It includes the multitude of stars whose light is seen as the Milky Way, the irregular luminous band that encircles the sky defining the plane of… … Universalium
Fotometría CCD — Saltar a navegación, búsqueda La fotometría CCD es un mecanismo variantes de la que dispone la fotometría para determinar la magnitud de los diferentes astros (estrellas, planetas, galaxias...). Aunque comenzó su andadura a mediados de los años… … Wikipedia Español
Cúmulo abierto M67 — M67 Datos de observación (Época J2000.0) Tipo I,2,r o II,2,m, según las fuentes … Wikipedia Español
