An easy introduction to astronomy for young gentlemen and ladies : describing the figure motions, and dimensions of the earth : the different seasons : gravity and light : the solar system : the transit of Venus and its use in astronomy : the moon's motion and phases : the eclipses of the sun and moon : the cause of the ebbing and flowing of the sea, &c. (1812)
Ferguson, James, 1710-1776 · Philadelphia : Johnson and Warner, Ann Cochran, printer · leaf 143
her centrifugal forcewere less than the power by which the Earth at-tracts her, she would come nearer and nearer theEarth in every revolution, and would fall upon itat last. J\\ I find, dear Eudosia, that you very seldomneed to be set right: and when I do, you alwaysimprove upon it, by making… … Gray X- Ttdds*. 120 year, the Moon must not only go round her orbitbetween change and change, but even advance asmany more degrees as the Earth has moved inits orbit during that time, in order to be again inconjunction with the Sun. For, in whatever partof the dial-plate of my watch, I find the…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
