Why are some stars brighter than others?

Answer

The appearance of a star depends on the size of the star, its distance and its temperature from the earth. The closer, the bigger and the hotter the star is, the brighter it will be. All stars have different sizes, temperatures and distances from us.
Q&A Related to "Why are some stars brighter than others?"
The brightness of a star depends on the size. The bigger the star, the brighter it will be. A bigger star will exert more energy than a smaller star. You can find more information
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Some stars are at stages of their development that produce more energy. Some stars are closer than others.
http://wiki.answers.com/Q/Why_are_some_stars_brigh...
Some stars are brighter because they have different luminosity leve...
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Because stars are at different distances from the Earth, and they are different sizes. Text us again.
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1 Additional Answer
A star's brightness is called its magnitude. Stars have brightness ranging in a spectrum. This is a breakdown of the light they give off. Stars range from blue to red in the spectrum. Blue stars are larger and hotter thus being more brilliant to the eye. Red stars are cooler and do not offer as much magnitude. This range is why some stars are brighter than others.
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