9. If the firing was done on a trajectory that was at right angles to the forward motion of the earth around the sun, then again considering the absolute stationary property of our light beam, during the time of our 1 second journey , both the moon and earth travelling at 30km/sec. will have moved forward 30km. from the firing line. (no pun) by the time it marks the moon. [Robert Bennett] This is the key to understanding the import of the NASA LLR results. It's impossible for Earth and Moon to exchange light beams using a single reflector that always returns the echo in the same direction as received...... if they are moving parallel to each other . If the Earth is motionless, it is not only possible, but actual, as shown by NASA and stated in my original post and in GWW. It is possible to receive the echo with intelligent aiming from Earth (leading the target) and from the Moon (aberration correction) . But the Moon reflector was not programmed. Well there you go.. If you had explainde it in simple terms we would have known what you meant.. Philip. [Robert Bennett] I did explain it a year ago.... in GWW.