If some angle (not 90 degrees) of light rayto the wave front (of a star) is detected in outer space, it will be an effectof observer's motion relative to aether.
On the moon's surface, there is a passengercar. To the roof, waves of sun-light (plane waves) are coming horizontally. Inthe roof, there is a small hole. When the passenger car moves to the right (orthe left), projection (spot-light on the floor) will move. And moon's motionwill have an effect (on the spot-light) also. The angle of light ray (in thepassengercar) will not be 90 degrees. http://www.geocities.co.jp/Technopolis/2561/eng.html