 | John Hubbard Wilkins - Astronomy - 1822 - 158 pages
...What phases does the Earth exhibit, as seen from the Moon? 74 What results from the Moon's turning on its axis in the same time that it revolves round the Earth ? 75 Describe the Moon's surface, as it appears through a telescope. SECT. VII. 76 At what distance... | |
 | John Hubbard Wilkins - Astronomy - 1825 - 151 pages
...larger does the Earth appear to the Moon than the Moon to us ? 106 What results from the Moon's turning on its axis in the same time that it revolves round the Earth ? 107 What is the consequence ? 108 Describe the Moon's surface, as it appears through a telescope.... | |
 | John Hubbard Wilkins - Astronomy - 1829 - 202 pages
...larger does the Earth appear to the Moon than the Moon to us ? .106 What results from the Moon's turning on its axis in the same time that it revolves round the Earth ? 107 What is the consequence ? 108 Describe the Moon's surface, as it appears through a telescope.... | |
 | John Lauris Blake - Astronomy - 1838 - 160 pages
...the moon? 18. Is the earth seen upon every part of the moon? 19. How do we know that the moon turns on its axis in the same time that it revolves round the earth ? 20. What were the dark parts of the moon formerly supposed to be ? 21 . What are they ? 22.... | |
 | John Gummere - Astronomy - 1842 - 516 pages
...revolutions of the satellites. Hence, it has been inferred that each satellite, like our moon, revolves on its axis in the same time that it revolves round the planet. SATURN AND HIS SATELLITES AND RINGS. 324. General Remarks. Saturn is a large planet, being... | |
 | John Russell Hind - Astronomy - 1853 - 120 pages
...brightness of this satellite in its various positions with respect to Saturn, Sir W. Herschel discovered that it rotates on its axis in the same time that it completes a revolution round the primary, and this is supposed to be the case also with the other seven.... | |
 | John Gummere, Ezra Otis Kendall - Astronomy - 1854 - 484 pages
...revolutions of the satellites. Hence, it has been inferred that each satellite, like our moon, revolves on its axis in the same time that it revolves round the planet. SATURN AND HIS SATELLITES AND RINGS. 324. Gf-eneral remarks. Saturn is a large planet, being... | |
 | J. J. Hooke - Science - 1870 - 106 pages
...? The inhabitants of the earth have seen only one side of the moon, in consequence of its rotating on its axis in the same time that it revolves round the earth. The sun and moon are said to be in conjunction when th« latter comes in a direct line between... | |
 | Postal Microscopical Society - Microscope and microscopy - 1890 - 370 pages
...observing the markings on the disc of the planet Mercury, and has come to the conclusion that the planet rotates on its axis in the same time that it revolves round the sun. If this be the case, we have the singular arrangement of a planet with a great part of one hemisphere... | |
 | John Ellard Gore - Astronomy - 1894 - 376 pages
...Professor Schiaparelli, the eminent Italian astronomer, concludes from his own observations that Mercury rotates on its axis in the same time that it revolves round the sun, viz. about 88 days. probably its surface diversified by land and water. In the case of the Earth we... | |
| |
This peculiarity is, that through tidal action caused by the sun, its day has been made to coincide with its year, or, more properly, that it rotates on its axis in the same time that it revolves round the sun. Hence it always presents the same face to... 
