QUOTE : Fitzgerald had noticed that if this sqrt(I-v^2/c^2) correction factor was applied to the analysis of Michelson's apparatus fixed on the earth's surface as it moved around the Sun, it could explain why Michelson measured no effect from the ether. The arm of the interferometer contracts by a factor sqrt(I-v^2/c^2) in the direction of its motion through the ether at a speed v. At an orbital speed of 29 kilometers per second this results in a contraction of only one part in 200,000,000 in the direction of the Earth's orbital motion. The length of the arm perpendicular to the ether's motion is unaffected. This small contraction effect exactly counterbalances the time delay expected from the presence of a stationary ether. If the Fitzgerald-Lorentz contraction occurred then it allowed the existence of a stationary ether to be reconciled with the null result of the Michelson-Morley experiment. Space need not be empty after all.