Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 118
dentsof the surface. Most curious of allare the light-coloredstreaks, or rays/which, radiate from cer-tain of the craters, ex-tending in some casesa distance of many hundred miles. They are usually from fiveto ten miles wide, and neither elevated nor depressed to anyconsiderable extent with… … Fig. 23. — Archimedes and the Apennines (Nasmyth). 108 MAP OF THE MOON. [§154 been given. The most remarkable of these ray-systems isthe one connected with the great crater Tycho, not very farfrom the moons south pole. The rays are not very conspic-uous until within a few days of full moon, but at…
Astronomy
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