The Planetary And Stellar Worlds: a Popular Exposition of the Great Discoveries And Theories of Modern Astronomy
The Planetary And Stellar Worlds: a Popular Exposition of the Great Discoveries And Theories of Modern Astronomy
O M Ormsby Macknight Mitchel
The book The Planetary And Stellar Worlds: a Popular Exposition of the Great Discoveries And Theories of Modern Astronomy was written by author O M Ormsby Macknight Mitchel Here you can read free online of The Planetary And Stellar Worlds: a Popular Exposition of the Great Discoveries And Theories of Modern Astronomy book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Planetary And Stellar Worlds: a Popular Exposition of the Great Discoveries And Theories of Modern Astronomy a good or bad book?
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The moon could not be arrested in its career , but is this necessary ? Is not the moon, in one sense, F 114 STRUCTURE OF THK UNIVERSE. constantly falling towards the earth? Newton asserted this to be true, and thus did he prove it. Stand upon the earth, and stretching outward into space 240,000 miles, there let the moon be located, poised and fixed in space, on a point of its present orbit. There let us suppose it to re- ceive an impulse in a direction perpendicular to the line which joins it t...o the eartn. By the first law of motion, being free to move, it will sweep off in a straight line, tangent to its present orbit, and will pass over a space in the first second of time, proportioned to the intensity of the impulse received. Mark that space, and bring the moon back to its primitive position. Now drop it to- wards the earth, and as it descends freely under the earth^s attraction, mark the space through which it falls in the first second of time. This being known, bring back the moon once again to its starting point.
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