(on the spectrum-luminosity diagram)

См. также в других словарях:

• spectrum-luminosity diagram — noun : a graph with the spectral type of each star plotted as the abscissa and the absolute magnitude as the ordinate …   Useful english dictionary

• The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… …   Wikipedia

• hertzsprung-russell diagram — ˈhertˌspru̇ŋˈrəsəl noun Usage: usually capitalized H&R Etymology: after Ejnar Hertzsprung died 1967 Dan. astronomer and Henry Norris Russell died 1957 American astrophysicist : spectrum luminosity diagram * * * /hairt sproong rus euhl/, Astron.… …   Useful english dictionary

• Color–color diagram — In astronomy, color–color diagrams are a means of comparing the apparent magnitudes of stars at different wavelengths. Astronomers typically observe at narrow bands around certain wavelengths, and objects observed will have different brightnesses …   Wikipedia

• Formation and evolution of the Solar System — Artist s conception of a protoplanetary disk The formation and evolution of the Solar System is estimated to have begun 4.568 billion years ago with the gravitational collapse of a small part of a giant molecular cloud …   Wikipedia

• Visible spectrum — White light is dispersed by a prism into the colors of the optical spectrum. The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye …   Wikipedia

• 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

• red dwarf — noun a small, old, relatively cool star; approximately 100 times the mass of Jupiter • Syn: ↑red dwarf star • Hypernyms: ↑star • Hyponyms: ↑flare star * * * noun : a star at the lower end of the main sequence in the spectrum luminosity diagram h …   Useful english dictionary

• Age of the Earth — This article is about scientific estimates of the age of the Earth. For religious and other non scientific estimates, see Dating Creation. Earth as seen from Apollo 17 The age of the Earth is 4.54 billion years (4.54 × 109 years ± 1%) …   Wikipedia

• subdwarf — ˈsəb+ˌ noun Etymology: sub + dwarf : a star having higher surface temperature for its mass and luminosity than is usual to stars of the main sequence and therefore having relatively high density and lying to the left of the main sequence on the… …   Useful english dictionary

• subgiant — “+ noun Etymology: sub + giant : a star of such color and luminosity that it falls above the main sequence of the spectrum luminosity diagram yet is not in the region of ordinary giant stars …   Useful english dictionary