color magnitude relation

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• 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

• 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 appear brighter in some… …   Wikipedia

• Diagramme couleur-magnitude des galaxies — Fichier:Galaxy color magnitude diagram.jpg Maquette simplifiée du diagramme couleur magnitude des galaxies, mettant en évidence trois populations : la séquence rouge, le nuage bleu et la vallée verte. Le diagramme couleur magnitude des… …   Wikipédia en Français

• Orders of magnitude (numbers) — The logarithmic scale can compactly represent the relationship among variously sized numbers. This list contains selected positive numbers in increasing order, including counts of things, dimensionless quantity and probabilities. Each number is… …   Wikipedia

• Dispersion relation — The refraction of a light in a prism is due to dispersion. In physics and electrical engineering, dispersion most often refers to frequency dependent effects in wave propagation. Note, however, that there are several other uses of the word… …   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

• 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

• Messier 22 — Core of Messier 22 Observation data (J2000 epoch) Class VII C …   Wikipedia

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

• Beehive Cluster — This article is about the Beehive Cluster. For other uses, see Beehive. Beehive Cluster The Beehive Cluster is an open cluster in Cancer just visible to the naked eye …   Wikipedia