Olmsted, Denison, 1791-1859. [from old catalog] · New York, R. B. Collins · leaf 110
, which divertsher from a straight course. For let the earth (Fig. 25.)be at E, and let the arc described by the moon in onesecond of time be Ab. Were the moon influenced byno extraneous force, to turn aside, she would have de-scribed, not the arc Ab, but the straight line AB, andwould have been… … This deviation from the tangent must be owing to someextraneous force. Does this force correspond to whatthe force of gravity exerted by the earth, would be atthe distance of the moon ? The question resolves itselfinto this: Would the force of gravity exerted by theearth upon the moon, cause the…
Astronomy
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