The book A Fourteen Weeks Course in Descriptive Astronomy was written by author Steele, Joel Dorman, 1836-1886 Here you can read free online of A Fourteen Weeks Course in Descriptive Astronomy book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Fourteen Weeks Course in Descriptive Astronomy a good or bad book?
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perigee and the sun in apogee ; for then the apparent size of the moon is greatest and that of the sun least. We see from 158 THE SOLAR SYSTEM. this that the relative situation of the moon and sun decides the length and kind of the eclipse. (9.) There cannot be more than five nor less than two solar eclipses per year, and of these a total or an annular one is exceedingly rare. For instance, there has not been a total eclipse visible at London since 1715, and previous to that, there had been non...e visible for five and a half centuries. (10.) A solar eclipse comes on the western limb or edge of the sun and passes off on the eastern. (11.) The disk of the sun and moon is divided into twelve digits, and the amount of the echpse is esti- mated by the number of digits which it covers. Thus an eclipse of six digits is one in which half the disk is concealed. Curious plienomena. — Various singular appearances sometimes attend a total eclipse. Around the sun is seen a beautiful Fig. eo. corona or halo of light, like that which paint- ers give to the head of the Virgin Mary.
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