Familiar lessons on astronomy ; designed for the use of children and youth .. (1848)
Fowler, Lydia F. (Lydia Folger), 1823-1879 · New York, Fowlers & Wells · leaf 154
rce of gravity would tend to bring the planetsto the earth, while centrifugal force tends to make themmove in a straight line; hence they move in a circleor in an ellipse. 5. What did Sir Isaac Newton leara from the falling of the apple ?6. Explain this as applied to the stone? 7. Where is this…
Astronomy
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