Online Encyclopedia

BINARY SYSTEM

Online Encyclopedia
Originally appearing in Volume V03, Page 948 of the 1911 Encyclopedia Britannica.
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BINARY SYSTEM, in astronomy, a system composed of two stars revolving around each other under the influence of their mutual attraction. A distinction was formerly made between double stars of which the components were in revolution around each other, and those in which no relative motion was observed; but it is now considered that all double stars must really be binary systems.
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