41. Binary Stars Roche Model Up Chapter 1 INTRODUCTION Previous Chapter 1 INTRODUCTION Contents Binary Stars Binary Stars. In 1802, Sir William Herschel coined the term ``binary star'' to http://mintaka.sdsu.edu/faculty/quyen/node9.html

Next: Roche Model Up: Chapter 1: INTRODUCTION Previous: Chapter 1: INTRODUCTION Contents Binary Stars Binary Stars Astronomers noticed that the light of some stars did not remain constant over time. In 1783, a young amateur astronomer, named John Goodricke, communicated to the astronomical community a periodic variation in the brightness of the star Algol, or Persei. Algol appeared to vary with a period of 2 day, 20 hours and 45 minutes (Goodricke 1783). (Note: This period only differs from the present day period of 4 minutes)! Goodricke's contribution to the study of binary systems lies in his interpretation of this light variation. Goodricke wrote that ``if it were not perhaps too early to hazard even a conjecture on the cause of this variation, I should imagine it could hardly be accounted for otherwise than...by the interposition of a large body revolving around Algol.'' Initially, William Herschel and other astronomers did not accept this unbelievable idea of one star blocking the light of another star. Time would prove these astronomers wrong, while observations would prove Goodricke's imagination right. The orientation of the orbital plane for a binary system can be randomly inclined with respect to one's line of sight to the system. If the orbital plane of the system is perpendicular to the line of sight, the observer will view the system ``face-on'' or at an inclination angle of

42. Binary Star, Ltd.: A Space Simulation Software Company A space simulation software development company. Products range from the integrated Shuttle mission simulation package, to its family of Interactive Space Simulations. http://www.binarystarltd.com

AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','494','height','279','src','images/homebanner','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','images/homebanner' ); //end AC code Home News Products Custom Simulation Development ... Contact Shoot for the stars. Simulation is a powerful tool for developing new systems by providing the opportunity to study and compare alternative designs, or to troubleshoot existing systems. Used extensively by industry and the government, simulation models convey how an existing system might perform if altered, or how a new system might behave before a prototype is fabricated. The players may even be other models, creating dynamic scenarios that detail the interactions of different models or disparate components. Binary Star Ltd. excels at placing the simulation experience in the hands of our customers. Participants are immersed within the simulated environment, engaged in a detailed visual experience that is useful for analysis as well as for role playing. Product Highlights AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','88','height','78','src','images/thumbvideo1','quality','high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','images/thumbvideo1' ); //end AC code

43. Binary Stars - Space And Astronomy Definition - Online Dictionary And Glossary D binary stars from an ever growing glossary of space and astronomy definitions. Find the definitions for binary stars and all your space and astronomy related words in this online http://space.about.com/od/glossaries/g/binarystars.htm

zWASL=1;zGRH=1 zJs=10 zJs=11 zJs=12 zJs=13 zc(5,'jsc',zJs,9999999,'') zDO=0 Home Education Space / Astronomy Space / Astronomy Search Space / Astronomy Share w(x2+zWl+'?p=1" zT="18/1[N" rel="nofollow">Print') Free Space / Astronomy Newsletter! Sign Up Discuss in my Forum binary stars From Nick Greene , former About.com Guide Filed In: Astronomy and Space Basics Glossaries Astronomy Dictionary Definition: binary stars: Binary stars are two stars that orbit around a common center of mass. An X-ray binary is a special case where one of the stars is a collapsed object such as a white dwarf, neutron star, or black hole, and the separation between the stars is small enough so that matter is transferred from the normal star to the compact star star, producing X-rays in the process. Books Related to Binary Stars An Introduction to Close Binary Stars Pulsar Astronomy Mass Transfer in Close Binary Stars Free Email Courses Space Tragedies 9 Planets in Nine Days Astronomy 101 Related Articles star cluster - Space and Astronomy Definition - Online Dictionary and Gloss... guest star - Space and Astronomy Definition - Online Dictionary and Glossar... neutron star - Space and Astronomy Definition - Online Dictionary and Gloss... Trail of Black Holes and Neutron Stars Points To Ancient Collision ... star - Space and Astronomy Definition - Online Dictionary and Glossary Defi... if(zSbL<1)zSbL=3;zSB(2);zSbL=0 Explore Space / Astronomy Must Reads What Is Astronomy?

44. BinaryStar Music | Info@binarystarmusic.com Focused on discover, develop, produce, and publish emerging performers of the genre. Based in Miami, Florida, USA. Artists, links, store, and contact information. http://www.binarystarmusic.com/

45. Binary Stars - The Galactic Fool A binary star is a star system consisting of two stars orbiting around their common centre of mass. The brighter star is called the primary and the other is its companion star or http://galacticfool.com/binary-stars/

46. NuWiki.com - Fast, Flexible, And Functional The first collaborative Wiki built exclusively for MultiValue/Pick databases to provide a solution for all those pesky database problems which defy normalizing to input routines. http://www.nuwiki.com

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48. General Relativity Simulation Contest Attempt at a content aimed at the Internet community to write a simulation program, based on a simple algorithm incorporating the laws of general relativity, that can realistically simulate the behavior of black holes, binary stars, and the twin paradox. http://users.telenet.be/nicvroom/contest.htm

General Relativity Simulation Contest Description of Contest The purpose of this Contest is to prove General Relativity. The Contest consist of the following task: Write one general purpose program (any programming language will do) which simulates the movement of n objects over a certain period of time. The simulation method used (algorithms), should be based on the Rules of General Relativity. The program should be able to simulate and demonstrate the following examples: Forward movement (perihelion shift) of the planet Mercury (43 arc sec angle) around the Sun. The bending of light around the Sun (1.75 sec). The movement of a binary star system. The stars should spiral together. A clock in a space ship around the Earth. Twin paradox (SR). i.e. at least two clocks should be included. The behaviour of black holes. The results of the simulation should match actual observations. For the rules of General Relativity see the following: General Relativity with John Baez For the most elaborate list of links for General Relativity see: Relativity on the World Wide Web by Chris Hillman , maintained by John Baez For a technical discussion about the problems with numerical simulations regarding General Relativity see: Numerical Relativity If you want more about celestial mechanics simulations informal newsletter

49. Binary Stars Summary | BookRags.com Binary Stars. Binary Stars summary with 3 pages of encyclopedia entries, research information, and more. http://www.bookrags.com/research/binary-stars-wop/

50. IOPscience::.. The Astronomical Journal Founded in 1849 and published by the American Astronomical Society with an emphasis on observational papers. Its expanded coverage of quasars, galaxies, supernova remnants, and studies of the interstellar medium complements the more traditional areas of astronomy, including galactic structure and dynamics, astrometry, variable and binary stars, solar system studies, and cosmology. http://www.iop.org/EJ/journal/aj

Accessibility Links Skip to content Skip to search IOPscience Skip to Journals list Accessibility help ... The Astronomical Journal All Fields Title/Abstract Author Affiliation Fulltext PACS/MSC Codes Last Week Last Month This Year Last Year 3 Years 5 Years 10 Years All Dates All journals This journal only IOPscience Home Search Collections ... Librarians ISSN 0004-6256 (Print) ISSN 1538-3881 (Online) The AJ publishes original astronomical research, with an emphasis on significant scientific results derived from observations, including descriptions of data capture, surveys, analysis techniques, and astronomical interpretation. Latest Issue (Complete) Number 5, 2010 November (1129-1568) Open Issue Number 6, 2010 December (1569-1765) Create an alert RSS this journal Volume listings Current volume Number 6, 2010 December Number 5, 2010 November Number 4, 2010 October Number 3, 2010 September Number 2, 2010 August Number 1, 2010 July Journal archive Vol 140, 2010 Vol 139, 2010 Vol 138, 2009 Vol 137, 2009 Vol 136, 2008 Vol 135, 2008 Vol 134, 2007 Vol 133, 2007 Vol 132, 2006

51. Email Me With Interest email me with interest http://binarystars.net/

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53. Eclipsing Binary Simulator (EBS) - Home Page Application to visualize the orbit and synthetic light curve of binary star systems. Includes information about this phenomenon, screenshots of the program, list of features and free download. http://www.cosmion.net/software/ebs/

(if your browser displays this text, it is not capable of displaying frames.) EBS is an astronomy application to visualise the orbit and synthetic light curve of binary star systems. It is made for educational purposes and for having fun. Main features Elliptical orbits Star selection by MLR-parameters or spectral class Light curve plotting 2D and 3D orthographic view of binary system Export light curve and orthographic view to bitmap Exporting light curve to data file Authors Programming : Jeroen Geertzen Math : Yigal Herstein, Jeroen Geertzen Screen shots (click to see magnification in new window) Overall view : main window, orthographic view, light curve and parameter panels. Orthographic view of binary system in XYZ space with orbit traces System requirements MS Windows 98 or higher. Screen resolution of 1024 x 768 pixels or higher. Download ebs1.zip (zipped, 359 KB) Installation Extract zip archive to a directory Execute ebs.exe Websites about eclipsing binary stars: Robert Wilson : Understanding binary stars via light curves Dan Bruton : Eclipsing Binary Stars Contact Comments, bug reports and feature suggestions are welcome and can be send to:

54. SPACE.com -- Binary Stars Host Potential Planet-forming Disk Disk of gas and dust found around nearby, young binary star system. http://www.space.com/scienceastronomy/090616-aas-molecular-disk.html

ArticleID = '4a37c4fd73692'; ArticleTitle = 'Binary Stars Host Potential Planet-forming Disk'; section = 'news'; News Space Flight Science Technology ... adult cam live advertisement spacecom:http://www.space.com/scienceastronomy/090616-aas-molecular-disk.html Binary Stars Host Potential Planet-forming Disk By Andrea Thompson Senior Writer posted: 16 June 2009 12:52 pm ET Giant planets, comets and Pluto-like bodies may form around binary star systems, not just single stars, a new study suggests. The evidence comes via a rotating, molecular disk found orbiting the young binary star system V4046 Sagittarii with the Submillimeter Array's radio telescope system atop Mauna Kea, Hawaii. This finding was announced last week by a team of astronomers at the 214th meeting of the American Astronomical Society in Pasadena, Calif. The discovery suggests that other binary systems could host as-yet undetected planets. Planets around binary stars have traditionally been difficult to detect because the added star complicates traditional planet-searching techniques. Extrasolar planets have been found orbiting around a few other binaries, but the stars in these systems are mostly much further apart than the V4046 Sagittarii pair. "In this case the stars are so close together, and the profile of the gas – in terms of the types of molecules that are there – is so much like the types of gaseous disks that we see around single stars, that we now have a direct link between planets forming around single stars and planets forming around double stars," said team member Joel Kastner of Rochester Institute of Technology in New York.

55. Wise Observatory, Department Of Astronomy And Astrophysics, Tel-Aviv University Research activities include imaging and photometry of planets, moons and comets, photometric and spectroscopic studies of novae, symbiotic stars and other cataclysmic variables, spectrophotometric studies of quasars and active galactic nuclei, photometry and spectroscopy of x-ray binaries, multi-color photometry of galaxies, studies of spectroscopic binary stars. Operated by Tel Aviv University. http://wise-obs.tau.ac.il/

Wise Observatory General Information Site Information Observing Hebrew Astro. Department Sackler Institute People ... Projects Research TAU Astroclub Public Outreach Description Pictures ... Sackler Institute of Astronomy International Institute for Experimental Astrophysics Hebrew News Publications Astrophysics Seminar ... Educational Resources The Florence and George WISE OBSERVATORY News/Announcements: Aug/2010 Tel Aviv astronomers decode separated asteroids Press Release Hebrew Media Jpost Astronomy Iba Hayadan ... AFTAU Mar/2010 Discovery of a new planet CoRoT-9b Hebrew Feb/2010 Kepler Spacecraft May Be Able to Spot Elusive Oort Cloud Objects Scientific American Oct/2009 "The Largest Gravitationally Lensed Images", discovered by Adi Zitrin and Tom Broadhurst Science Magazine Editor's Choice Column Oct/2009 Interview with Dr. Smadar Naoz in ynet (Hebrew) 16/Sep/2009 CoRoT-7b: First solid evidence for a rocky exoplanet [ English Hebrew Hebrew Articles: ynet nrg more... by Friedel Loinger , e-mail:

56. The Astrophysics Spectator: Binary Star Systems These properties support the idea that stars are born with their companions, as it is unlikely that they could acquire companions so rapidly after birth. Binary stars therefore http://www.astrophysicsspectator.com/topics/stars/BinaryStars.html

The Astrophysics Spectator Home Topics Interactive Pages Commentary ... Information Search Site Stars Introduction Interior Structure Nuclear Fusion Hydrogen Fusion ... Binary Star Birth Tables Characteristics of the Sun 10 Brightest Stars within 10 pc Energy Excess in Nuclei Elemental Abundances Stars Binary Stars Stars are often born in groups. Early in the history of the universe, many stars were born in compact clusters of hundreds of thousands or millions of stars called globular clusters. More recent star formation within the Galactic disk gives rise to open clusters of hundreds or thousands of stars. But stars are also born in smaller groupings of two or three. Many of the bright, nearby stars are members of binary or triplet star systems. For instance, the brightest star in the sky, Sirius, is a member of a triple-star system. The second-closest star to Earth, Rigil Kentaurus (α Centauri) has a slightly-dimmer companion star. Another bright, nearby star, Procyon (α Canis Minoris), has a 13 th magnitude companion star. These systems are not unusual. In fact, multiple star systems of main-sequence stars are far more common than single main-sequence stars in the Galactic disk. The binary main-sequence star systems slightly outnumber single main-sequence stars. The ratios of binary systems to triplet and quadruplet systems is This means that only 34% of the main sequence stars in the Galactic disk have no companion stars.

57. Orion's Arm - Encyclopedia Galactica - Binary Stars Alpha Centauri A + B, a distant binary pair with planets orbiting both stars. An even more distant companion, Proxima, orbits the pair at 12000 AU http://www.orionsarm.com/eg-article/460d90f53fb24

HOME GALACTOGRAPHY HISTORY SCIENCE ... Merchandise BY LETTER A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Binary Stars Science Astronomy Image from Steve Bowers Alpha Centauri A + B, a distant binary pair with planets orbiting both stars. An even more distant companion, Proxima, orbits the pair at 12000 AU Binary stars are two stars rotating around a common centre of mass. About half of all stars are binaries of one sort or another. Many star systems in fact contain more than two stars; but these multiple systems can generally be regarded as multiple sets of binary stars orbiting one another. Castor , for instance, contains three pairs of stars. There are four categories of binary stars, depending on how close the stars are to one another. Distant Binaries orbit many astronomical units from each other. A distant binary such as Alpha Centauri A+B can have planets orbiting one, or both, stars, but only if the planets orbit at a distance of less than one third of the minimum distance between the stars. Close Binaries orbit within a few stellar diameters of each other, but are not in direct physical contact. Close binaries can have a system of planets orbiting around both stars, but only if the orbit of the closest planet orbit is wider than more than 3.5 x the distance between the stars ( more on close binaries here ). Both Distant Binaries and Close Binaries are known as

58. Binary Star: Definition From Answers.com Semidetached binary stars are binary stars where one of the components fills the binary star's Roche lobe and the other does not. Gas from the surface of the Roche lobe filling http://www.answers.com/topic/binary-star

59. Binary Stars Double Stars/Binary Stars . Binary Star . Double Star . Earth . Earth http://www.physics.sfasu.edu/markworth/ast105/Binary-Stars.ppt

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60. Binary Stars | Video Lectures From Academic Earth Academic Earth offers free access to video courses and academic lectures from leading colleges and universities. http://academicearth.org/lectures/search/Binary Stars

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