Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Binary_star> ?p ?o }
- Binary_star abstract "A binary star is a star system consisting of two stars orbiting around their common center of mass. Systems of two, three, four, or even more stars are called multiple star systems. These systems, especially when more distant, often appear to the unaided eye as a single point of light, and are then revealed as double (or more) by other means. Research over the last two centuries suggests that half or more of visible stars are part of multiple star systems.The term double star is often used synonymously with binary star; however, double star can also mean optical double star. Optical doubles are so called because the two stars appear close together in the sky as seen from the Earth; they are almost on the same line of sight. Nevertheless, their \"doubleness\" depends only on this optical effect; the stars themselves are distant from one another and share no physical connection. A double star can be revealed as optical by means of differences in their parallax measurements, proper motions, or radial velocities. Most known double stars have not been studied sufficiently closely to determine whether they are optical doubles or they are doubles physically bound through gravitation into a multiple star system.Binary star systems are very important in astrophysics because calculations of their orbits allow the masses of their component stars to be directly determined, which in turn allows other stellar parameters, such as radius and density, to be indirectly estimated. This also determines an empirical mass-luminosity relationship (MLR) from which the masses of single stars can be estimated.Binary stars are often detected optically, in which case they are called visual binaries. Many visual binaries have long orbital periods of several centuries or millennia and therefore have orbits which are uncertain or poorly known. They may also be detected by indirect techniques, such as spectroscopy (spectroscopic binaries) or astrometry (astrometric binaries). If a binary star happens to orbit in a plane along our line of sight, its components will eclipse and transit each other; these pairs are called eclipsing binaries, or, as they are detected by their changes in brightness during eclipses and transits, photometric binaries.If components in binary star systems are close enough they can gravitationally distort their mutual outer stellar atmospheres. In some cases, these close binary systems can exchange mass, which may bring their evolution to stages that single stars cannot attain. Examples of binaries are Sirius and Cygnus X-1 (Cygnus X-1 being a well known black hole). Binary stars are also common as the nuclei of many planetary nebulae, and are the progenitors of both novae and type Ia supernovae.".
- Binary_star thumbnail Sirius_A_and_B_Hubble_photo.jpg?width=300.
- Binary_star wikiPageExternalLink dsl.html.
- Binary_star wikiPageExternalLink VisualDoubleStars.
- Binary_star wikiPageExternalLink binary_stars.html.
- Binary_star wikiPageExternalLink multiple%20star%20systems.
- Binary_star wikiPageExternalLink Algol.
- Binary_star wikiPageExternalLink ejaavso401467.
- Binary_star wikiPageExternalLink barr1908.htm.
- Binary_star wikiPageExternalLink binaries.htm.
- Binary_star wikiPageExternalLink gallery.php?gallery=Stars2.
- Binary_star wikiPageID "52713".
- Binary_star wikiPageLength "62029".
- Binary_star wikiPageOutDegree "291".
- Binary_star wikiPageRevisionID "707384059".
- Binary_star wikiPageWikiLink 104_Aquarii.
- Binary_star wikiPageWikiLink 107_Aquarii.
- Binary_star wikiPageWikiLink 61_Cygni.
- Binary_star wikiPageWikiLink A-type_main-sequence_star.
- Binary_star wikiPageWikiLink AM_Canum_Venaticorum_star.
- Binary_star wikiPageWikiLink Absolute_magnitude.
- Binary_star wikiPageWikiLink Accretion_(astrophysics).
- Binary_star wikiPageWikiLink Accretion_disk.
- Binary_star wikiPageWikiLink Albireo.
- Binary_star wikiPageWikiLink Algol.
- Binary_star wikiPageWikiLink Algol_paradox.
- Binary_star wikiPageWikiLink Alpha_Centauri.
- Binary_star wikiPageWikiLink Alpha_Crucis.
- Binary_star wikiPageWikiLink Alvan_Graham_Clark.
- Binary_star wikiPageWikiLink Andromeda_Galaxy.
- Binary_star wikiPageWikiLink Angular_momentum.
- Binary_star wikiPageWikiLink Angular_resolution.
- Binary_star wikiPageWikiLink Antares.
- Binary_star wikiPageWikiLink Apparent_magnitude.
- Binary_star wikiPageWikiLink Astrometry.
- Binary_star wikiPageWikiLink Astrophysics.
- Binary_star wikiPageWikiLink Atmosphere_of_Earth.
- Binary_star wikiPageWikiLink Auriga_(constellation).
- Binary_star wikiPageWikiLink B-type_main-sequence_star.
- Binary_star wikiPageWikiLink BG_Geminorum.
- Binary_star wikiPageWikiLink Barycenter.
- Binary_star wikiPageWikiLink Bayer_designation.
- Binary_star wikiPageWikiLink Benedetto_Castelli.
- Binary_star wikiPageWikiLink Beta_Centauri.
- Binary_star wikiPageWikiLink Beta_Lyrae.
- Binary_star wikiPageWikiLink Big_Dipper.
- Binary_star wikiPageWikiLink Binary_stars_in_fiction.
- Binary_star wikiPageWikiLink Binary_system.
- Binary_star wikiPageWikiLink Binoculars.
- Binary_star wikiPageWikiLink Biosphere.
- Binary_star wikiPageWikiLink Black_hole.
- Binary_star wikiPageWikiLink CNO_cycle.
- Binary_star wikiPageWikiLink Canis_Major.
- Binary_star wikiPageWikiLink Canis_Minor.
- Binary_star wikiPageWikiLink Castor_(star).
- Binary_star wikiPageWikiLink Cataclysmic_variable_star.
- Binary_star wikiPageWikiLink Category:Articles_containing_video_clips.
- Binary_star wikiPageWikiLink Category:Binary_stars.
- Binary_star wikiPageWikiLink Category:Exoplanetology.
- Binary_star wikiPageWikiLink Category:Star_types.
- Binary_star wikiPageWikiLink Centaurus.
- Binary_star wikiPageWikiLink Center_of_mass.
- Binary_star wikiPageWikiLink Chandrasekhar_limit.
- Binary_star wikiPageWikiLink Circle.
- Binary_star wikiPageWikiLink Circumbinary_planet.
- Binary_star wikiPageWikiLink Comes.
- Binary_star wikiPageWikiLink Compact_star.
- Binary_star wikiPageWikiLink Conservation_law.
- Binary_star wikiPageWikiLink Constellation.
- Binary_star wikiPageWikiLink Contact_binary.
- Binary_star wikiPageWikiLink Cosmic_distance_ladder.
- Binary_star wikiPageWikiLink Crux.
- Binary_star wikiPageWikiLink Cygnus_(constellation).
- Binary_star wikiPageWikiLink Cygnus_X-1.
- Binary_star wikiPageWikiLink Degenerate_matter.
- Binary_star wikiPageWikiLink Density.
- Binary_star wikiPageWikiLink Doppler_effect.
- Binary_star wikiPageWikiLink Double_star.
- Binary_star wikiPageWikiLink Earths_orbit.
- Binary_star wikiPageWikiLink Eclipse.
- Binary_star wikiPageWikiLink Electromagnetic_radiation.
- Binary_star wikiPageWikiLink Ellipse.
- Binary_star wikiPageWikiLink Epsilon_Aurigae.
- Binary_star wikiPageWikiLink Eta_Carinae.
- Binary_star wikiPageWikiLink Exoplanet.
- Binary_star wikiPageWikiLink File:Algol_AB_movie_imaged_with_the_CHARA_interferometer_-_labeled.gif.
- Binary_star wikiPageWikiLink Friedrich_Bessel.
- Binary_star wikiPageWikiLink Félix_Savary.
- Binary_star wikiPageWikiLink Galileo_Galilei.
- Binary_star wikiPageWikiLink Gamma_Cephei.
- Binary_star wikiPageWikiLink Gemini_(constellation).
- Binary_star wikiPageWikiLink Geminiano_Montanari.
- Binary_star wikiPageWikiLink Ghoul.
- Binary_star wikiPageWikiLink Giant_star.
- Binary_star wikiPageWikiLink Giovanni_Battista_Riccioli.
- Binary_star wikiPageWikiLink Gravitational_energy.
- Binary_star wikiPageWikiLink Gravitational_lens.
- Binary_star wikiPageWikiLink Gravity.
- Binary_star wikiPageWikiLink HD_30453.
- Binary_star wikiPageWikiLink Hubble_Space_Telescope.