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dents pity also the man of to-morrow, who
is not to be allowed to read, in the original
Latin of the brilliant Kepler, how he was
able–by observations taken from a moving
platform, the earth, of the directions of a
moving object, Mars–to deduce the exact
shape of the path of each of these planets,
and their actual positions on these paths at
any time. Kepler’s masterpiece is one of the
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