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Celestial Sphere with Analemma JS Model
written by Todd Timberlake and Wolfgang Christian
The Celestial Sphere and Analemma JavaScript Model simulates the Two Sphere Universe theory of the Ancient Greeks. This theory supposes the stars to be fixed on the surface of a Celestial Sphere, with the spherical Earth at the center of this sphere. The simulation shows the motion of Sun and stars in this model, as well as the horizon plane for an observer on the spherical Earth. Two views are shown: one from outside the Celestial Sphere, and the other from the point of view of an observer on Earth looking up. Most of the characteristics of the simulation can be adjusted, including the tilt of the ecliptic relative to the equator, the latitude of the observer, the time of day and the time of year.

The Celestial Sphere and Analemma JavaScript Model was developed using the Easy Java/JavaScript Simulations (EJS) modeling tool. Although EJS is a Java program, EJS v5 and above can be used to create stand-alone JavaScript programs that run in almost any browser.
Subjects Levels Resource Types
Astronomy
- Astronomy Education
= Curricula
- Fundamentals
= Celestial Mechanics
= Night Sky
- Historical Astronomy
= History of Astronomy
- Lower Undergraduate
- Middle School
- High School
- Upper Undergraduate
- Instructional Material
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Educators
- General Publics
- text/html
- application/zip
  • Currently 0.0/5

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Access Rights:
Free access
License:
This material is released under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 license.
Rights Holder:
Wolfgang Christian
Keywords:
Earth, Sun, celestial globe
Record Cloner:
Metadata instance created April 24, 2017 by Wolfgang Christian
Record Updated:
July 20, 2017 by Wolfgang Christian
Last Update
when Cataloged:
April 24, 2017

AAAS Benchmark Alignments (2008 Version)

4. The Physical Setting

4A. The Universe
  • K-2: 4A/P2. The sun can be seen only in the daytime, but the moon can be seen sometimes at night and sometimes during the day. The sun, moon, and stars all appear to move slowly across the sky.

NSES Content Standards

Con.D: Earth & Space Science
  • K-4: Objects in the Sky
  • K-4: Changes in Earth & Sky
  • 5-8: Earth in the Solar System
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
T. Timberlake and W. Christian, Computer Program CELESTIAL SPHERE WITH ANALEMMA JS MODEL, Version 1.0 (2017), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14326&DocID=4689).
AJP/PRST-PER
T. Timberlake and W. Christian, Computer Program CELESTIAL SPHERE WITH ANALEMMA JS MODEL, Version 1.0 (2017), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14326&DocID=4689>.
APA Format
Timberlake, T., & Christian, W. (2017). Celestial Sphere with Analemma JS Model (Version 1.0) [Computer software]. Retrieved December 16, 2017, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14326&DocID=4689
Chicago Format
Timberlake, Todd, and Wolfgang Christian. "Celestial Sphere with Analemma JS Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14326&DocID=4689 (accessed 16 December 2017).
MLA Format
Timberlake, Todd, and Wolfgang Christian. Celestial Sphere with Analemma JS Model. Vers. 1.0. Computer software. 2017. 16 Dec. 2017 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14326&DocID=4689>.
BibTeX Export Format
@misc{ Author = "Todd Timberlake and Wolfgang Christian", Title = {Celestial Sphere with Analemma JS Model}, Month = {April}, Year = {2017} }
Refer Export Format

%A Todd Timberlake
%A Wolfgang Christian
%T Celestial Sphere with Analemma JS Model
%D April 24, 2017
%U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14326&DocID=4689
%O 1.0
%O text/html

EndNote Export Format

%0 Computer Program
%A Timberlake, Todd
%A Christian, Wolfgang
%D April 24, 2017
%T Celestial Sphere with Analemma JS Model
%7 1.0
%8 April 24, 2017
%U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14326&DocID=4689


Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

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 Style.org: Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

Celestial Sphere with Analemma JS Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

Use the Easy Java Simulations Modeling and Authoring Tool to edit and to explore the source code for the Celestial Sphere with Analemma JS Model.

relation by Wolfgang Christian

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