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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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B
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Binary_star
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1992-09-03
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A pair of stars moving in orbit around their
common centre of mass.
Observations show that most stars are binary,
or even multiple - for example, the nearest
star system to the Sun, Alpha Centauri. A
spectroscopic binary is a binary in which two
stars are so close together that they cannot
be seen separately, but their separate light
spectra can be distinguished by a
spectroscope. Another type is the eclipsing
binary.