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 IndexOur GalaxyStarsBinary stars
Visual binaries
the systems with both components visible
 
Astrometric binaries
the systems with only one component visible, the proper motion and position of which is perturbed by another component
 
Spectroscopic binaries
the stars with variations in their spectra that may be due to presence of the second component
 
Eclipsing binaries
where one component is eclipsed by another
 
Physical Doubles or Binaries
Figures with description.
 
Phi Persei: Double Star
APOD's image (December 12, 1997) with explanation.
 
The Double Star Library
Only links.
 
Evolved Stars in Binaries
An excellent example HD185510. Movie simulating how the stars orbiting one another.
 
Binary brown dwarfs
Binary brown dwarfs page at Phil Plait's Bad Astronomy site.
 
Binary stars
Binary stars page by Padua Astronomical Observatory.
 
The Webb Society
An international society of amateur and professional astronomers specialising in the observation of double stars and 'deep sky' objects, founded in 1967.
 
Relativistic Binaries in Globular Clusters
Article by Matthew J. Benacquista at Living Reviews in Relativity website.
 
Binary stars
Online lecture by James Schombert at the University of Oregon website on basic binary star properties.
 
Observing Double Stars for Fun and Science - Amateurs can still contribute to the study of binary stars
An article by Sky and Telescope.
 
The Importance of Binary Stars
Astronomy course notes by David Hanes at Queen's University Astronomy Group website.
 
Eagle Creek Observatory - Double Stars
Double Stars List by Constellation.
 
The Top 10 Double or Multiple Stars
A list at the "Catching the Light" astrophotography website by Jerry Lodriguss.
 
The DUNLOP CATALOGUE of DOUBLE STARS
A catalogue at "Southern Astronomical Delights" website by Andrew James.
 
The Spirit of 33
An International Network of Double Stars Observers
 
Astronomical League Double Star Club
The purpose of the Double Star Club is to introduce observers to 100 of the finest double and multiple stars in the heavens.
 
Double Stars To Follow
An article by Martin Gaskell of the Prairie Astronomy Club.
 
Double Star Drawings
Double star drawings by the Belmont Society.
 
Biaze Colours
The Colours Of Double Stars - an article by Paul Baize at "Southern Astronomical Delights" website by Andrew James.
 
Double Star List
A Double Star Catalog by the Belmont Society.
 
X-ray Binary Stars
X-ray binary stars information at NASA's Imagine the Universe website.
 
Deep Sky Database: Search for double stars within a constellation
Search for double stars by constellation and separation. Deep Sky Database is an online observing list generator for amateur astronomers which employs a web-based version of the Saguaro Astronomy Club's database, consisting of over 10,000 records.
 
X-ray Binaries
Properties and behaviour of X-ray binary systems discussed with a lot of illustrations included. A page at NASA GSFC website by Nicholas White.
 
HubbleSite - News Releases about binary stars
Hubble Space Telescope news releases related to binary stars including images made by HST.
 
High Energy Astrophysics Picture Of the Week, July 2, 2001: Compact Binary Quantization?
Astronomers have discovered an underlying pattern in the apparently random variations in X-ray brightness for 3 important compact binaries.
 
The Winnecke Catalog of Double Stars
August Winnecke (1835-97) published a series of observations, entitled "Doppelsternmessungen" (Double Star Measurements), in Astronomische Nachrichten No. 1738, vol 73, p 147-160, published in Altona, February 8, 1869.
 
Catalogue of Cataclysmic Binaries, Low-Mass X-Ray Binaries and Related Objects
This catalogue lists coordinates, apparent magnitudes, orbital parameters, stellar parameters of the components and other characteristc properties of cataclysmic binaries, low-mass X-ray binaries and related objects with known or suspected orbital periods, together with a comprehensive selection of the relevant recent literature. Hosted by Max Planck Institute for Astrophysics.
 
Natural Particle Accelerator Discovered - a Universe Today article
Astronomers have discovered a binary system of a blue giant and a pulsar that operate as a natural particle accelerator, raising the energy levels of simple photons to some of the highest possible energies.
 
Binary star
Information on binary stars by Wikipedia, the free encyclopedia.
 
Types of Binary Stars
Introduction to binary stars at Australia's Commonwealth Scientific and Industrial Research Organisation web site.
 
X-ray Binaries including black holes
Introduction to binary stars including their images and spectra, provided by NASA's High Energy Astrophysics Science Archive Research Center.
 
APOD Index - Stars: Binary Stars
Binary star images with descriptions from NASA's Astronomy Picture of the Day site.
 
What is an X-ray binary?
An article by Ulf Torkelsson from the Department of Astronomy and Astrophysics of the Gothenburg University.
 
Astronomy Lecture Notes - Binary Stars
A brief description of binary stars with examples and images at the website of the University of Mississippi.
 
Binary Star Motions
Using Kepler's Laws to determine the mass of a binary system. A web page by Cornell University.
 
Binary star concept from the Astronomy Knowledge Base
Definition, main properties and examples of binary stars.
 
Integral Reveals New Class Of 'Supergiant' X-ray Binary Stars - ESA news article
ESA's Integral gamma-ray observatory has discovered a new, highly populated class of X-ray fast 'transient' binary stars, undetected in previous observations.
 
The Evolution of Compact Binary Star Systems
An article by Konstantin A. Postnov and Lev R. Yungelson at the Living Reviews in Relativity website.
 
Binary and Variable Stars
A brief introduction to binary stars at the Journey Through the Galaxy website.
 
A Sub-Stellar Jonah - European Southern Observatory science release
Using ESO's Very Large Telescope, astronomers have discovered a rather unusual system, in which two planet-size stars, of different colours, orbit each other.
 
Hanwell Community Observatory | Double Stars
Recommendations for visual double star observing at the Hanwell Community Observatory's website.
 
The Tycho double star catalogue
The Tycho Double Star Catalogue is based on Tycho and Tycho-2 catalogues and contains a total of 103259 entries.
 
The Double Star Website of Nice
SIDONIe (Site Informatique des étoiles Doubles de Nice) - Double star database of the Nice-Côte d'Azur Observatory.
 
Journal of Double Star Observations
The Journal of Double Star Observations is an electronic journal published quarterly by the University of South Alabama. The JDSO is especially interested in observations made by amateur astronomers.
 
DOUBLE STAR LIBRARY
The Double Star Library hopes to be a means by which various types of binary and multiple star information can be easily disseminated among binary star astronomers in IAU Commission 26 and related commissions. These types of information include (but are not limited to) lists of newly discovered systems or orbits, new astrometric or spectroscopic data for known systems, notices of meetings or observing campaigns, and titles of recently published papers.
 
NASA Mission Finds Link Between Big and Small Stellar Blasts
Proof that certain double star systems can erupt in full-blown explosions and then continue to flare up with smaller bursts has been spotted by the ultraviolet eyes of NASA's Galaxy Evolution Explorer.
 
85 Double, Multiple, and Stars of Unusual Color (sorted by constellation)
Object list derived from DeepMap 600, copyright (c) 1997 Orion Telescopes & Binoculars.
 
Astrometry & Dynamics: Double & Multiple Stars - Royal Observatory of Belgium (Brussels)
This page aims at giving you some basic information on double stars, on new observational techniques used to study these (e.g CCD) and shows results for some double stars obtained by the succesful HIPPARCOS space mission. We hope to raise in you a lot of questions about the Universe in general and double stars in particular.
 
Double Stars
Sky and Telescope articles on binary stars.
 
Celestial odd couple discovered - Astronomy Magazine article
Astronomers are puzzled by the "Hang-loose Binary" - a pair of low-mass stars with an extreme orbital separation.
 
Binaries among Galactic classical Cepheids
Information on cepheids in the Milky Way galaxy which are known to have a physical companion. Provided by Konkoly Observatory of the Hungarian Academy of Sciences.
 
Milky Way mystery possibly solved - Astronomy Magazine article
A vast cloud of antimatter in our galaxy may be traced to binary stars.
 
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