The Planetarium and Astronomical Calculator
General Books, 2013 - 50 pages
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1832 edition. Excerpt: ...What is understood by the Moon's Phases 1 What is discovered by observing the moon with a telescope? Of what use is the ruggedness to us 1 If the surface of the moon is uneven, why does it not so appear when viewed by the eye only? What is the moon? What part of the moon do we discover 1 When is she said to be in conjunction with the Sun? When she is in her first octant, how much of her enlightened side is visible 1 How much of her enlightened side does she show in her first quarter? When she has gone half around her orbit, how does she appear? How does she appear when viewed from the Sun? Are the moon's motions faster or slower than the earth's, from her change to her first quarter 1 How far does she fall behind the earth 1 From her first quarter to hsr lull, which moves with the greatest rapidity? Which from the full to her third quarter? Which from the third quarter to the change 1 Is the gravity of the moon at any time greater towards the Sun, than towards the earth, and at what time? How much greater is the quantity of matter in the Sun, than in the earth? In what proportion does the attraction of each body diminish? How far from the earth is the point of equal attraction between the earth and the Sun? Why does not the moon leave the earth and go to the Sun? What is understood by the Harvest Moon? How many minutes later at the equator does the moon rise every day, than on the preceding? Is there any material difference in high northern, of southern latitudes? At what time in northern latitudes, does the full moon rise? How many days together does the moon in such cases rise at nearly the same time? What is the cause of this small difference? How far does the earth advance in her orbit, while the moon goes round the ecliptic? How many...