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color-color diagram

(means of comparing characteristics of stars)

A color-color diagram is a graph plotted on two color indices of an object, e.g., B-V versus U-B. It is a useful way to characterize stars, clusters and galaxies when the distance, and thus the absolute magnitude, is not well known, since ratios of colors are independent of distance.

Color-color diagrams have been created for extra-solar planets to help classify them. Colors of transiting planets can be deduced with sufficient observational data.


(magnitude,color,stars,EMR,diagram,astrophysics)
http://en.wikipedia.org/wiki/Color-color_diagram
http://coolwiki.ipac.caltech.edu/index.php/Color-Magnitude_and_Color-Color_plots

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