Color
Look up on a clear night, far away from city lights, and you will see
thousands of stars. If you look closer, you might notice that the stars
shine with an amazing variety of colors. Some glow dull red, some blue,
some yellow like the sun, and some bright white. The picture to the right
shows three stars as seen by the SDSS.
But what exactly is color? Why do stars have different colors? And what
can you learn by studying the colors of stars, galaxies, and other
objects?
Click Next to find out.
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