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  Star: Astronomy: Star - OBSERVING STARS
Posted on Tuesday, December 07 @ 14:13:00 CST by astronomy
 
 
  Star

OBSERVING STARS

To appreciate the aesthetics ot a starry sky, all you need are your eyes and perhaps a pair of binoculars. But a telescope helps you study each star up close.

You may notice that some stars appear to have a faint companion star next to them. These are double stars, and thousands can be seen with a small telescope. Other stars appear to vary in brightness trom one night to the next. These variable stars have periods ranging from minutes to years. On the H-R diagram, many kinds of variables fall within a transitional region called the "instability strip."

 
 
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