The Origin, Structure, and Evolution of the Stars

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A glance at the stars on a dark, moonless night away from the lights and other distractions of the city is one of nature’s most rewarding scenes. Although the number of stars in the dark vault of the heavens appears to the eye to be incredibly large, only three thousand are visible at any one time. But with the aid of even small telescopes it is possible to observe a million stars, and we are able to photograph well over a hundred million stars with a 200-inch telescope at Mount Palomar. All these stars belong to a unit in space that we commonly call the galaxy, although our galaxy is only one among millions of other galaxies that are found in the universe.

 

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