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binary system
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{{short description|Two astronomical bodies which orbit each other}}{{For|binary numbers|Binary number}}{{other uses}}{{Refimprove|date=February 2015}}A binary system is a system of two astronomical bodies of the same kind that are comparable in size. Definitions vary, but typically require the center of mass to be located outside of either object. (See animated examples.)The most common kinds of binary system are binary stars and binary asteroids, but brown dwarfs, planets, neutron stars, black holes and galaxies can also form binaries.A multiple system is similar but consists of three or more objects, for example trinary stars and trinary asteroids.- the content below is remote from Wikipedia
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Classification
In a binary system, the brighter or more massive object is referred to as primary, and the other the secondary. Binary stars are also classified based on orbit. Wide binaries are objects with orbits that keep them apart from one another. They evolve separately and have very little effect on each other. Close binaries are close to each other and are able to transfer mass from one another. They can also be classified based on how we observe them. Visual binaries are two stars separated enough that they can be disinguished through binoculars or a small telescope.Eclipsing binaries are where the objects' orbits are at an angle that when one passes in front of the other it causes an eclipse, as seen from Earth.Binary companion (minor planets)
File:Pluto-Charon_system-new.gif|thumb|right|The dwarf planet Pluto and its moon Charon are often described as a binary system in the Solar System, which orbit the SunSunWhen binary minor planets are similar in size, they may be called "binary companions" instead of referring to the smaller body as a satellite.WEB, 2009-09-17, Satellites and Companions of Minor Planets, IAU / Minor Planet Center,weblink 2011-01-08, dead,weblink" title="web.archive.org/web/20110121153650weblink">weblink 2011-01-21, Good examples of true binary companions are the 90 Antiope and the 79360 SilaâNunam systems. Pluto and its largest moon Charon are sometimes described as a binary system because the barycenter (center of mass) of the two objects is not inside either of them, but Charon is small enough compared to Pluto that it is usually classified as a moon.WEB,weblink Can We Call Pluto and Charon a 'Binary Planet' Yet?, Ian O'Neill, Discovery News, 8 August 2014, 15 July 2015, Orcus and its moon Vanth also orbit around a barycenter not inside either of them.The Sun and Jupiter orbit a point outside of either, but are not considered a binary because they are different kinds of objects.See also
- Binary asteroid
- Binary star
- Contact binary
- Contact binary (small Solar System body)
- Double planet
- Rotational Brownian motion
References
{{reflist}}External links
Bibliography
- Astronomy: A Visual Guide by Mark A. Garlick
- content above as imported from Wikipedia
- "binary system" does not exist on GetWiki (yet)
- time: 7:32am EDT - Sat, May 18 2024
- "binary system" does not exist on GetWiki (yet)
- time: 7:32am EDT - Sat, May 18 2024
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