 | Nautical astronomy - 1977 - 1412 pages
...diameters of the sun and moon. The maximum length that can occur is a little more than seven minutes. If the apparent diameter of the moon is less than that of the sun, its shadow does not quite reach the earth. Over a small area of the earth directly in line with the... | |
 | 1836 - 456 pages
...truth, such darkness as was anticipated, could hardly occur in an annular eclipse ; and as the mean apparent diameter of the moon is less than that of the sun, the chances are, upon the whole, against any particular eclipse being total. This is a circumstance... | |
 | John Gummere - Astronomy - 1837 - 506 pages
...diameter of the moon is less than that of the sun ; and in any given period, the time for which the true apparent diameter of the moon is less than that of the sun is greater, than the time during which it is greater. Hence it will occur that at the time of new moon,... | |
 | Jacques Ozanam - 1840 - 850 pages
...; the flowers contract their leaves ; a coldness is felt, ¿nd the dew falls ; but as the moon bas suffered a few rays of the solar light to escape,...April 1764, was of this kind to a part of Europe, and also that of May 1836. During eclipses of this kind, when the sun is entirely eclipsed, a luminous... | |
 | Dionysius Lardner - Astronomy - 1854 - 870 pages
...the duration of a total solar eclipse can never exceed four minutes. 2913. Annular eclipses. — When the apparent diameter of the moon is less than that of the sun, its disk will not cover that of the sun. even when concentrical with it. In this case, a ring of light... | |
 | Dionysius Lardner - Astronomy - 1853 - 960 pages
...the duration of a total solar eclipse can never exceed four minutes. 2913. Annular eclipses. — When the apparent diameter of the moon is less than that of the sun, its disk will not cover that of the sun, even when concentrical with it. In this case, a ring of light... | |
 | Dionysius Lardner - Arts - 1856 - 466 pages
...minute, it follows that the duration of a total solar eclipse can never exceed four minutes. 18. When the apparent diameter of the moon is less than that of the sun, its disc will not cover that of the sun, even when concentrical with it. In this case, a ring of light... | |
 | Dionysius Lardner - 1857 - 194 pages
...minute, it follows that the duration of a total solar eclipse can never exceed four minutes. 18. When the apparent diameter of the moon is less than that of the sun, its disc will not cover that of the sun, even when concentrical with it. In this case, a ring of light... | |
 | Dionysius Lardner - Astronomy - 1858 - 912 pages
...the duration of a total solar eclipse can never exceed four minutes. 2913. Annular eclipses. — When the apparent diameter of the moon is less than that of the sun, its disk will not cover that of the son, even when concentrical with it. In this case, a ring of light... | |
 | Dionysius Lardner - Astronomy - 1860 - 614 pages
...the duration of a total solar eclipse can never exceed four minutes. 504. Annular eclipses. — When the apparent diameter of the moon is less than that of the sun, its disk will not cover that of the sun, even when concentrical with it. In this case, a ring of light... | |
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But since the mean synodic motion of the moon is at the rate of 30" per minute, it follows that the duration of a total solar eclipse can never exceed four minutes. 
