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Effort to prove Galileo and Einstein wrong fails

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They were right within two trillionths of a percent of each other:

Now, after spending two years dropping two objects of different mass into a free fall in a satellite, a group of scientists has concluded that Galileo and Einstein were right: The objects fell at a rate that was within two-trillionths of a percent of each other, according to a new study.

This effect has been confirmed time and time again, as has Einstein’s theory of relativity — yet scientists still aren’t convinced that there isn’t some kind of exception somewhere. “Scientists have always had a difficult time actually accepting that nature should behave that way,” said senior author Peter Wolf, research director at the French National Center for Scientific Research’s Paris Observatory. Yasemin Sapakoglu, “Why physicists are determined to prove Galileo and Einstein wrong” at LiveScience

It’s almost as if the universe were governed by mathematical laws designed from outside itself. But we aren’t allowed to conclude that, of course.

See also: What becomes of science when the evidence does not matter?

Actually, if you drop two masses at the exact same time at different parts of a room (even in vacuum) they will hit the ground at slightly different times. This is not because Galileo or Einstein we’re wrong, but because the force of gravity differs from one spot to another on earth. Ed George
Within an atmosphere they will fall at slightly different rates due to air resistance. I doubt it would have been measurable in Galileo's experiment but if you repeat it with a cannonball vs a polystyrene ball of the same diameter you could probably measure a difference. aarceng

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