The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 78
^° of the northpole, the entire diurnalcircle described by thesun will be above thehorizon, so that the sunwill not set. At placeswithin 23!^° of the southpole of the earth, the en-tire diurnal circle will bebelow the horizon, so thatFig. 73. the sun will not rise. The illumination of the earth at… … 6o ASTKONOMY. mination extends 23^° beyond the north pole, and falls 23^°short of the south pole. As the earth rotates on its axis,places near the north pole will be in the sunshine all the time,while places near the south pole will be out of the sunshineall the time. All places north of the…
Astronomy
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