Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 76
3^° 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… … 60 ASTRONOMY. 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
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Novae coelestium terrestriumq[ue] rerum observationes : et fortasse hactenus non uulgatae (1646)](https://img.insideoutlibrary.com/img/200/ia-novaecoelestiumt00font-46-14.webp)
