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 84
Of course, when it is summer in the northern hemisphere,it is winter in the southern hemisphere, and the reverse. ASTRONOMY. 67 … Fig. 77 shows the portion of the earths orbit included in each season. It will be seen that the earth is at perihelion in the winter season for places north of the equator, and at aphelion in the summer season. This tends to mitigate somewhat the extreme temperatures of our winters and summers. 70.…
Astronomy
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