Illustrates the phenomenon known as the aberration of starlight. Stellar Aberration 2D Model illustrates the phenomenon known as the aberration of starlight, first reported by James Bradley in 1729. Aberration occurs because light has a finite speed, and thus light from a star takes a finite amount of time to travel through the tube of a telescope. During this time, the telescope moves as a result of Earth's rotational and orbital motions (in this case, the orbital motion is more important because it is faster). Therefore, if the telescope is pointed directly at the star the starlight will hit the sides of the tube before reaching the eyepiece. To see the star the telescope must be pointed forward (ie in the direction of Earth's motion) very slightly.

Controls
1. Play/Pause: start and stop the simulation.
2. Step: advance the simulation by one time step.
3. Reset: reset the simulation to its initial state.
4. Speed: the speed of Earth divided by the speed of light.
5. Tilt: tilt angle of the telescope (in degrees).

Requirements:
* Java

The license of this software is Free, you can free download and free use this calculator software.