Dante and the early astronomers . ^NesternXHorr^on. l\Iew Moon 2EW0f Pleiade Fig. 9. Third Year, •full. New Moon distant from the Pleiadeson the 1st of Nisan. Tne sun is now 2x11 = 22 days march, or about 22% short of his tirst position, andthe young moon consequently about 22° west of the Pleiades, so she will not come upwith them until the 3rd Nisan, after travelling 2x13 = 26°. The year was thereforefull, that is an extra month of 29 days was added, which is more than the 22 daysneeded to enable the sun to reach first psit on by tlie 1st tif Nisan in tlie fourth ye:ir. It apjjears, the
Dante and the early astronomers . ^NesternXHorr^on. l\Iew Moon 2EW0f Pleiade Fig. 9. Third Year, •full. New Moon distant from the Pleiadeson the 1st of Nisan. Tne sun is now 2x11 = 22 days march, or about 22% short of his tirst position, andthe young moon consequently about 22° west of the Pleiades, so she will not come upwith them until the 3rd Nisan, after travelling 2x13 = 26°. The year was thereforefull, that is an extra month of 29 days was added, which is more than the 22 daysneeded to enable the sun to reach first psit on by tlie 1st tif Nisan in tlie fourth ye:ir. It apjjears, therefore, that the extra moutli must have been added once in tliree orfour years. THE BEGINNINGS OF ASTRONOMY. 43 when these old astronomers first linked the isolatedstars into a continuous series of twelve star-groups andconnected the idea of the month with the invisiblegroup among which the sun was known to be shining,instead of with the stars seen east or west of him, orin conjunction with the crescent moon.^
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Keywords: ., bookcentury1900, booksubjectastronomy, booksubjectdantealighieri
