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double star

double star Two stars that appear close together in the sky. There are two types of double star: binary stars and optical doubles (two stars that are quite distant from each other, but appear close together as a result of chance alignment).

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"double star." World Encyclopedia. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"double star." World Encyclopedia. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/double-star

"double star." World Encyclopedia. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/double-star

double star

double star: see binary star.

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"double star." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 19 Oct. 2017 <http://www.encyclopedia.com>.

"double star." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (October 19, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/double-star

"double star." The Columbia Encyclopedia, 6th ed.. . Retrieved October 19, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/double-star