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Binary star

A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars are among the most important objects in astrophysics because they allow direct measurement of stellar masses and test theories of stellar evolution. Binary stars in the night sky that are seen as a single object to…

Measurement, Classifications & Evolution

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Overview

Discovery

Etymology

Classifications

Orbit

Designations

Evolution

Astrophysics

Examples

Multiple-star examples

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Binary star

Nodes217
Edges216
Triples106
Avg. degree1.99
Density0.009217
Components1

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Binary star

Top relations

related to Examples · 22
Binary star → Albireo, Also, Alvan Graham Clark, An, Another, Auriga, Beta Lyrae, Canis Major, Cygnus, Cygnus X-1, Epsilon Aurigae, F0, Friedrich Bessel, Hubble Space Telescope, In, It, Lyra, Mount Wilson Observatory, Sirius, Sun
related to Discovery · 17
Binary star → Acrux, Benedetto Castelli, Big Dipper, Double, Early, English, Evidence, Father Fontenay, Galileo, Giovanni Battista Riccioli, He, John Michell, Mizar, Pleiades, Southern Cross, The, Ursa Major
related to A and B · 9
Binary star → AB, Additional, Bayer, Centauri, Centauri AB, In, Reticuli, The, Zeta Reticuli
related to Mass transfer and accretion · 9
Binary star → As, If, It, Lagrange, Lagrangian, RLOF, Roche, Since, The
related to Research findings · 8
Binary star → Among, Binary, It, Milky Way, That, The, There, This
see also · 7
Binary star → Aquarii, Brownian, Cancri, Cassiopeiae, CassiopeiaKepler-14, EarthBeta CentauriBinary, Two-body
related to Astrophysical importance · 6
Binary star → Binaries, Binary, From, In, The, They
related to Configuration of the system · 5
Binary star → Another, Detached, Most, Roche, While
related to Etymology · 5
Binary star → Binary, By, For, Sir William Herschel, The
related to Orbital elements · 3
Binary star → Centauri AB, From, The

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Important terminology

binary star stars binaries mass system orbit systems also visual two companion eclipsing components spectroscopic may orbital double known period

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Binary staris abinary star for which the angular separation between the two components is great enough to permit them to be observed as a double star in a telescope0.90text
Binary staris abinary star system in which the orbital plane of the two stars lies so nearly in the line of sight of the observer that the components undergo mutual eclipses0.90text
a white dwarfinstance ofW Ursae Majoris is an example.Cataclysmic variables and X-ray binariesWhen a binary system contains a compact object0.80text
neutron star or black holeinstance ofW Ursae Majoris is an example.Cataclysmic variables and X-ray binariesWhen a binary system contains a compact object0.80text
gas from the otherinstance ofW Ursae Majoris is an example.Cataclysmic variables and X-ray binariesWhen a binary system contains a compact object0.80text
a white dwarfinstance ofCataclysmic variables and X-ray binariesWhen a binary system contains a compact object0.80text
neutron star or black holeinstance ofCataclysmic variables and X-ray binariesWhen a binary system contains a compact object0.80text
gas from the otherinstance ofCataclysmic variables and X-ray binariesWhen a binary system contains a compact object0.80text
neutron star binariesinstance ofThey also play key roles in the production of exotic objects0.80text
black hole binariesinstance ofThey also play key roles in the production of exotic objects0.80text
which are sources of gravitational waves.Binaries provide the best method for astronomers to determine the mass of a distant starinstance ofThey also play key roles in the production of exotic objects0.80text
Binary starhas methodBinary0.60section

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