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Computer Program Detail Page

Item Picture
Eclipsing Binary Stars
written by Mario Belloni
Eclipsing Binary Stars model simulates the detection of eclipsing binary stars. In this method, the light curve from the combination of the two stars, and how it changes over time due to each star transiting (or being occulted or eclipsing the other), is observed and then analyzed. In this simulation each star orbits the other in circular motion via Kepler's third law.  When one star passes in front of the other (transits), it blocks part of the starlight of the other star. This decrease in starlight is shown on the graph.  In the simulation the binary star system is shown as seen from Earth (edge on view) and from overhead, but magnified greatly, and with the star sizes not shown to the scale of the orbit. The mass, radius, and temperature of each star can be changed.

The simulation uses either simple 3D or Java 3D (if installed) to render the view the stars. If Java 3D is not installed, the simulation defaults to simple 3D using Java.

The Eclipsing Binary Stars model was created using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_astronomy_eclipsing_binaries.jar file will run the program if Java is installed.

Please note that this resource requires at least version 1.5 of Java (JRE).

Please note that this resource requires Java3D.
1 source code document is available
Subjects Levels Resource Types
- Astronomy Education
= Curricula
- Stars
= Binary Stars
- Lower Undergraduate
- High School
- Informal Education
- Instructional Material
= Demonstration
= Simulation
Intended Users Formats Ratings
- Educators
- Learners
- application/java
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Access Rights:
Free access
This material is released under a GNU General Public License Version 3 license.
Rights Holder:
Mario Belloni
EJS, Easy Java Simulations, OSP, Open Source Physics, binary, binary stars, detection, eclipse, star, transit
Record Cloner:
Metadata instance created July 15, 2010 by Mario Belloni
Record Updated:
December 2, 2021 by Lyle Barbato
Last Update
when Cataloged:
July 15, 2010
Other Collections:

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Record Link
AIP Format
M. Belloni, Computer Program ECLIPSING BINARY STARS, Version 1.0 (2010), WWW Document, (
M. Belloni, Computer Program ECLIPSING BINARY STARS, Version 1.0 (2010), <>.
APA Format
Belloni, M. (2010). Eclipsing Binary Stars (Version 1.0) [Computer software]. Retrieved June 19, 2024, from
Chicago Format
Belloni, Mario. "Eclipsing Binary Stars." Version 1.0. (accessed 19 June 2024).
MLA Format
Belloni, Mario. Eclipsing Binary Stars. Vers. 1.0. Computer software. 2010. Java (JRE) 1.5, Java3D. 19 June 2024 <>.
BibTeX Export Format
@misc{ Author = "Mario Belloni", Title = {Eclipsing Binary Stars}, Month = {July}, Year = {2010} }
Refer Export Format

%A Mario Belloni %T Eclipsing Binary Stars %D July 15, 2010 %U %O 1.0 %O application/java

EndNote Export Format

%0 Computer Program %A Belloni, Mario %D July 15, 2010 %T Eclipsing Binary Stars %7 1.0 %8 July 15, 2010 %U

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Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

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Eclipsing Binary Stars:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Eclipsing Binary Stars.

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