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| Description: Stars and the Interstellar Medium (c) Each dot plotted on this H-R diagram represents a star in the Pleiades whose luminosity and surface temperature have been determined. Note that most of the cool, low-mass stars have arrived at the main sequence, indicating that hydrogen fusion has begun in their core. The cluster has a diameter of about 5 ly, is about 100 million years old, and contains about 500 stars Picture Stats: Views: 616 Filesize: 146.18kB Height: 900 Width: 782 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18403 |