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optical double
optical double Two stars that happen to lie close to the same line of sight, and thus appear near each other on the sky. The components of an optical double are at different distances and are not related. An optical double is therefore distinct from a physical double, whose components are bound by gravity. Optical doubles are rarer than true binaries.
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Cite this article
"optical double." A Dictionary of Astronomy. 1997. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "optical double." A Dictionary of Astronomy. 1997. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O80-opticaldouble.html "optical double." A Dictionary of Astronomy. 1997. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-opticaldouble.html |
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optical double
optical double see binary star . |
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Cite this article
"optical double." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "optical double." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1E1-X-opticdoub.html "optical double." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-opticdoub.html |
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