 | Hamilton Lanphere Smith - 1848 - 336 páginas
...we have assumed at 8000 miles, or equal lengths, we can, from knowing this, ascertain the distance of the moon from the earth, and of the earth from the sun. Every one is familiar with the fact, that every change of position of a spectator, causes an apparent... | |
 | Anna Cabot Lowell - 1850 - 378 páginas
...through 2.2 this space in a minute of time owing to the sun's attraction. But we know the distance of the moon from the earth, and of the earth from the sun. The latter distance is four hundred times the former. The whole attraction is in a ratio made... | |
 | John Charles Duncan - 1926 - 484 páginas
...tor MN about 5,700 miles; but its actual value varies by about 600 miles with the varying distance of the Moon from the Earth and of the Earth from the Sun. At its . . FIG. 89. SHADOWS greatest, MN IS about three t1mes the d1ameter OF THE EARTH of the... | |
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Therefore, the distances of the Moon from the Earth and of the Earth from the Sun are constantly varying. 