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written by Todd Timberlake
The Ptolemy/Copernicus/Tycho Model illustrates the relationships between the systems of planetary astronomy developed by Claudius Ptolemy, Nicholas Copernicus, and Tycho Brahe.  The model presents a simplified version of all three systems, showing the motions of the Sun/Earth and two planets (one inferior, one superior).  The model is initially set to model the planets Venus and Mars.  In addition, the apparent motion of the sun and two planets across the sky is displayed in another window.

This model can be used to illustrate the essential geometric equivalence between these three system.  In particular, it shows that the Earth's orbit (in the Copernican system) becomes the orbit of the sun in the Ptolemaic and Tychonic systems, and also appears as the deferent of Venus and epicycle of Mars in the Ptolemaic system.  The orbit of Venus about the sun (in the Copernican and Tychonic systems) becomes
the epicycle of Venus in the Ptolemaic system.  The orbit of Mars about the sun (in the Copernican and Tychonic systems) becomes the deferent of Mars in the Ptolemaic system.

Please note that this resource requires at least version 1.5 of Java (JRE).
View the supplemental document attached to this resource
  • Activity for the Ptolemy Copernicus Tycho Model
    This zip archive contains LaTeX and PDF versions of a handout for an activity that allows students to explore the Ptolemy Copernicus Tycho Model.  The activity focuses on the general geometrical equivalence of the three models, as well as the specific connections between the different models.
View the source code document attached to this resource
  • Ptolemy Copernicus Tycho Source Code
    The source code zip archive contains an XML representation of the EJS Ptolemy/Copernicus/Tycho Model.   Unzip this archive in your EJS workspace to compile and run this model using EJS.
Subjects Levels Resource Types
Astronomy
- Astronomy Education
= Curricula
- Historical Astronomy
= History of Astronomy
= Philosophy of Science
- Solar System
- Lower Undergraduate
- High School
- Instructional Material
= Simulation
Intended Users Formats Ratings
- Learners
- Educators
- General Publics
- application/java
  • Currently 0.0/5

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Access Rights: Free access
License: This material is released under a GNU General Public License Version 3 license.
Keywords: Copernicus, EJS, Easy Java Simulations, OSP, Open Source Physics, Ptolemy, Tycho, deferent, epicycle, orbit, planet, retrograde
Record Creator: Metadata instance created May 12, 2011 by Todd Timberlake
Record Updated: Jun 11, 2014 by Andreu Glasmann
Last Update
when Cataloged:
May 12, 2011
Other Collections:
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
T. Timberlake, Computer Program PTOLEMY COPERNICUS TYCHO, Version 1.0 (2011), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11200&DocID=2242).
AJP/PRST-PER
T. Timberlake, Computer Program PTOLEMY COPERNICUS TYCHO, Version 1.0 (2011), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11200&DocID=2242>.
APA Format
Timberlake, T. (2011). Ptolemy Copernicus Tycho (Version 1.0) [Computer software]. Retrieved July 30, 2014, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11200&DocID=2242
Chicago Format
Timberlake, Todd. "Ptolemy Copernicus Tycho." Version 1.0. http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11200&DocID=2242 (accessed 30 July 2014).
MLA Format
Timberlake, Todd. Ptolemy Copernicus Tycho. Vers. 1.0. Computer software. 2011. Java (JRE) 1.5. 30 July 2014 <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11200&DocID=2242>.
BibTeX Export Format
@misc{ Author = "Todd Timberlake", Title = {Ptolemy Copernicus Tycho}, Month = {May}, Year = {2011} }
Refer Export Format

%A Todd Timberlake
%T Ptolemy Copernicus Tycho
%D May 12, 2011
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11200&DocID=2242
%O 1.0
%O application/java

EndNote Export Format

%0 Computer Program
%A Timberlake, Todd
%D May 12, 2011
%T Ptolemy Copernicus Tycho
%7 1.0
%8 May 12, 2011
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11200&DocID=2242


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Citation Source Information

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

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Ptolemy Copernicus Tycho:

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 Ptolemy Copernicus Tycho.

relation by Wolfgang Christian

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