The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 135
Fig. 131. Il6 ASTRONOMV. 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. (i) We may measure Jie 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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