The following formulas are used to calculate the position of each planet. Certain assumptions are made and therefore the positions are only approximations.

First the mean anomoly is calculated:

,where M is the mean anomoly and Tp and longitude of perihelion are constants.

Then the heliocentric longitude is calculated:

,where v is the true anomoly. However, by assuming that eccentricity is 0 (the orbit of the planet is a perfect circle), the true anomoly becomes the mean anomoly (M).

So now, since the radius of the orbit of the planets is given, and we also have the heliocentric longitude, we can calculate the coordinate of the planet in the solar system using simple trigonometry:
X coordinate = orbital radius * cos(heliocentric longitude)
Y coordinate = orbital radius * sin(heliocentric longitude)

For more information and to find out how to get a better approximation please refer to the following book:
Practical astronomy with your calculator By Peter Duffett-Smith

This is a 3D solar system simulation application, which gives you the approximate location of the planets in the solar system at different time, and some information about each one of them. This application uses HTML5 and WebGL.

Version 0.21

• A "Shaders" option has been added in the "Settings" mene. Users who don't see the three inner planets can disable the shaders to view those planets.
• Reducing the height of the Help panel slightly so that it fits better for some users who can't see the entire panel.

Version 0.2

• The Moon has been added (with approximately correct position).
• City lights texture is added to Earth.
• Earth atmosphere has been added.
• A bug that caused the camera to jump when zooming out of a planet is fixed.

Version 0.1

• The initial release.