Software Listing of Author : "Todd Timberlake"
- Earth Orbit Model
- License: Freeware
- Price: 0.00


The EJS Earth Orbit model illustrates the Copernican theory of Earth's orbit around the sun. The top window shows a view from outside the celestial sphere. The simulation shows the moving Earth along with its axis or rotation and the line of sight from Earth, through Sun, to the Celestial Sphere. The end of the arrow indicates where, on the Celestial Sphere, Sun appears to be located as seen from Earth. The tilt of Earth's rotational axis (relative to the ecliptic plane) is adjustable. The bottom window shows the view of a portion of the sky (near the ecliptic) as seen by an observer on Earth. You can modify this simulation if you have EJS installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.
EJS Earth Orbit model was created using the Easy Java Simulations (EJS) modeling tool....
- Publisher: Todd Timberlake
- Date Released:
- Download Size: 1331 KB
- Download
- Platform: Win2000, WinOther, WinServer, WinVista
- Gnomon Model
- License: Shareware
- Price:


The EJS Gnomon model simulates the shadow cast by a gnomon (the part of a sundial that casts the shadow) over the course of a day for any day of the year and any latitude on Earth. The program gives you the option to use mean Sun (which moves relative to the stars at a constant rate throughout the year) or true Sun (which varies its apparent speed relative to the background stars). The default is to use true Sun. The program also shows the observer's horizon plane on the spherical Earth, as well as the ecliptic and the apparent path of Sun. The Earth View can be set to let Earth rotate or remain fixed
EJS Gnomon 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_Gnomon.jar file will run the program if Java is...
- Publisher: Todd Timberlake
- Date Released:
- Download Size: 1167 KB
- Download
- Platform: Win2000, Windows 7, WinOther, WinServer, WinVista
