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color-luminosity relation

См. также в других словарях:

  • 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

  • Messier 73 — Observation data (J2000 epoch) Constellation Aquarius …   Wikipedia

  • Main sequence — A Hertzsprung Russell diagram plots the actual brightness (or absolute magnitude) of a star against its color index (represented as B V). The main sequence is visible as a prominent diagonal band that runs from the upper left to the lower right.… …   Wikipedia

  • Hertzsprung–Russell diagram — Hertzsprung–Russell diagram[1] with 22,000 stars plotted from the Hipparcos catalog and 1,000 from the Gliese catalog of nearby stars. Stars tend to fall only into certain regions of the diagram. The most predominant is the diagonal, going from… …   Wikipedia

  • Séquence principale — Le diagramme de Hertzsprung Russell figure les étoiles. En abscisse, l indice de couleur (B V) ; en ordonnée, la magnitude absolue. La séquence principale se voit comme une bande diagonale marquée allant du haut à gauche au bas à droite. Ce… …   Wikipédia en Français

  • 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 , Ejnar — (1873–1967) Danish astronomer Hertzsprung was born in Frederiksberg, Denmark, the son of a senior civil servant who had a deep interest in mathematics and astronomy but who was anxious to see that his son received a more practical education.… …   Scientists

  • Large Magellanic Cloud — The Large Magellanic Cloud Observation data (J2000 epoch) Constellation Dorado/Mensa …   Wikipedia

  • Kruger 60 — A/B Observation data Epoch J2000      Equinox Constellation Cepheus Kruger 60 A Right ascension 22h 27m 59.4677s[ …   Wikipedia

  • Hyades (star cluster) — Hyades Cluster Observation data (J2000.0 epoch) Constellation …   Wikipedia

  • value — I. noun Etymology: Middle English, worth, high quality, from Anglo French, from Vulgar Latin *valuta, from feminine of *valutus, past participle of Latin valēre to be of worth, be strong more at wield Date: 14th century 1. a fair return or… …   New Collegiate Dictionary

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