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 140
iles on all sides aroundCopernicus. The district on the south-east side is speciallyrich in these thickly scattered craters, which we have reasonto suppose stand over or upon the bright streaks. *L ASTRONOMY. I23 118. Dark Chasms. — Dark cracks, or chasms, have beenobserved on various parts of the… … Fig. 138. One of the most remarkable groups of these chasms isthat to the west of the crater named Triesneker. Thecrater and the chasms are shown in Fig. 138. Several ofthese great cracks obviously diverge from a small crater nearthe west bank of the great one, and they subdivide as theyextend from…
Astronomy
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