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 133
Fig. 131. u6 ASTRONOMY. are in the shade. The bright patches in the neighborhoodof the terminator are the sides of- hills and mountains whichare receiving the full light of the sun, while the denseshadows near by are cast by these elevations. 114. Height of the Lunar Mountains.—There are twomethods… … Fig. 132. (1) We may measure the length of the shadows, andthen calculate the height of the mountains that would castsuch shadows with the sun at the required height above thehorizon. The length of a shadow may be obtained by the followingmethod : the longitudinal wire of the micrometer (19) is…
Astronomy
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