Assuming that this statement is true (and I believe that it is) what makes the measurement so accurate?
Originally Posted by wisp
To answer my own question, from the fact that NASA, and other institutions, bounced laser light off of reflectors placed on the moon. Now, bouncing laser light off of the moon doesn't, in and of itself, yield the answer magically. What happens is that the round trip of the light is timed very accurately, and that time is multiplied by the speed of light (which is defined as c)!
Since the earth/moon distance is determined in this manner, and the models of the earth/moon distance is based on this procedure, then the next question that needs to be answered is:
How can one use the same procedure to prove that the speed of light is not constant?
On a lighter note, if the guys at NASA are really that good at this measurment thing, then where did the saying 'guess the units, hit the planet' come from?
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