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Related phrases:   binary star system

Definitions of binary star:

• a pair of stars that are gravitationally bound and in orbit about each other.
  www.gsfc.nasa.gov/gsfc/spacesci/pictures/2003/0702pulsarspeed/0702ssu_glossary.htm
• A system of two stars orbiting around a common centre of mass due to their mutual gravity. Binary stars are twins in the sense that they formed together out of the same interstellar cloud.
  www.aoe.com.au/astronomical_glossary.html
• A stellar system consisting of two stars orbiting about a common center of mass and often appearing as a single visual or telescope object. Also known as a double star.
  www.wro.org/ras/glossary/a-c.htm
• A double star; a system containing two or more stars, locked in constant orbit. In an eclipsing binary, one star goes behind the other periodically, changing the total amount of light we can see.
  library.thinkquest.org/12523/glossary.html
• Two stars revolving about each other; a double star.
  www.astro.virginia.edu/~rjp0i/museum/glossary.html
• A system of two stars, orbiting around one another. Binary (and triple and even higher multiples) stars are very common; astronomers estimate that about half of all stars are members of multiple-star systems. The nearest star to our solar system, Alpha Centauri, is actually our nearest example of a multiple star system — it consists of three stars — two very similar to our Sun and one dim, small, red star — orbiting around one another.
  www.rayvillard.com/hcc_glossary.htm
• Two (or more) stars that rotate around a common center of mass.
  www.go-astronomy.com/glossary/astronomy-glossary-b.htm
• Two stars which revolve around each other's center of gravity. Mizar, the 2nd star in the handle of the Big Dipper is a binary star. Have a look at it. The sky is brimming with binary star systems.
  www.synapticsystems.com/sky/skygloss.htm
• a system of two stars that revolve around each other under their mutual gravitation
  wordnet.princeton.edu/perl/webwn
• A binary star system consists of two stars both orbiting around their barycenter. For each star, the other is its "companion star".
  en.wikipedia.org/wiki/Binary_star

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