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#::The objection has been raised that this would still be a counterexample to Relativity.

#::The objection has been raised that this would still be a counterexample to Relativity.

#:::Yes, if it were actually true that the Moon's orbit is undergoing some kind of anomalous perturbation, it would indeed be a disproof of Relativity, Newtonian mechanics, and, in fact, all of physics since Galileo.

#:::Yes, if it were actually true that the Moon's orbit is undergoing some kind of anomalous perturbation, it would indeed be a disproof of Relativity, Newtonian mechanics, and, in fact, all of physics since Galileo.

#::::Actually, the average radius of the Moon's orbit is in fact increasing. By 38mm a year. This was first predicted in the late 19th century and actually measured since at least the early 1970's and more accurately thereafter thanks to the mirrors left for that purpose by the Apollo astronauts. The reason for this is well-known and simple enough to be explained on science-oriented TV shows from time to time. To put it simply: the Moon pulls on the Earth causing the tides and slowing down its rotation slightly, lengthening it's day by 2 milliseconds every 100 years. Reciprocally, the Earth pulls on the Moon and accelerates it slightly thus increasing the height of its orbit. For a more complete explanation see <ref>http://curious.astro.cornell.edu/question.php?number=124</ref>. This behavoiur, predicted over 100 years ago, observed and measured, is in no way "anomalous" and relativity, general, special or otherwise doesn't really concern itself with tidal mechanics so on that point at least physics, Galillean, Newtonian and Einsteinian, are quite safe for now.

#::::Actually, the average radius of the Moon's orbit is in fact increasing. By 38mm a year. This was first predicted in the late 19th century and actually measured since at least the early 1970's and more accurately thereafter thanks to the mirrors left for that purpose by the Apollo astronauts. The reason for this is well-known and simple enough to be explained on science-oriented TV shows from time to time. To put it simply: the Moon pulls on the Earth causing the tides and slowing down its rotation slightly, lengthening it's day by 2 milliseconds every 100 years. Reciprocally, the Earth pulls on the Moon and accelerates it slightly thus increasing the height of its orbit and energy is conserved. For a more complete explanation see <ref>http://curious.astro.cornell.edu/question.php?number=124</ref>. This behavoiur, predicted over 100 years ago, observed and measured, is in no way "anomalous" and relativity, general, special or otherwise doesn't really concern itself with tidal mechanics so on that point at least physics, Galillean, Newtonian and Einsteinian, are quite safe for now.

#''The Pioneer anomaly.''

#''The Pioneer anomaly.''

#:The "Pioneer anomaly" is the deviation in the motion of the Pioneer 10 and Pioneer 11 spacecraft from their predicted motion, at the distance of Saturn and beyond.  It should be noted that the anomaly is about 1000 times greater than the difference between the classical Newtonian prediction and the prediction of relativity, so this is not a problem with relativity ''per se''; it is more general than that.

#:The "Pioneer anomaly" is the deviation in the motion of the Pioneer 10 and Pioneer 11 spacecraft from their predicted motion, at the distance of Saturn and beyond.  It should be noted that the anomaly is about 1000 times greater than the difference between the classical Newtonian prediction and the prediction of relativity, so this is not a problem with relativity ''per se''; it is more general than that.