File:Hertzsprung-russel diagram.png

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Description This is an example of a Hertzsprung-Russell diagram; a plot of luminosity versus spectral class for a group of stars. The diagonal band labelled "main sequence" is where dwarf stars such as the Sun spend most of their active lifespan. Red giants and supergiants are evolved stars with a mass greater than a red dwarf, that are burning elements heavier than hydrogen. However, White Dwarfs are quite dense, non-luminous, but are still less in mass than supergiants. Once this supply of fuel is exhausted, these stars will migrate to the lower left on this diagram, becoming white dwarfs.
Date
Source This illustration by the contributor is based on Figure 3 (p. 52) of Great Ideas and Theories of Modern Cosmology by Jagjit Singh.[1]
Author Illustraion by R.J. Hall
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Hertzsprung–Russell diagram
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Sun Sirius sparse
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Well-known stars in the Milky Way
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I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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References

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  1. ↑ Jagjit Singh, Great Ideas and Theories of Modern Cosmology 1970, Dover Publications, Inc., New York, ISBN 0-486-20925-3.

File history

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Date/TimeThumbnailDimensionsUserComment
current09:59, 24 January 2007Thumbnail for version as of 09:59, 24 January 2007693 × 819 (51 KB)Pngbot (talk | contribs)optimized with optipng
15:44, 18 December 2006Thumbnail for version as of 15:44, 18 December 2006693 × 819 (72 KB)RJHall (talk | contribs)Sample Hertzsprung-Russell diagram

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