Familiar lessons on astronomy ; designed for the use of children and youth .. (1848)
Fowler, Lydia F. (Lydia Folger), 1823-1879 · New York, Fowlers & Wells · leaf 63
? What can wesuppose the coin to be ? What can we then use for a measurement ? MOUNTAINS OF THE MOON. 53 it has just been stated that the scale is in this case halfan inch to one thousand miles ; since, then, the coinmeasures two half inches in diameter, the moon mustmeasure two thousand miles in… … TELESCOPIC APPEARANCE OF THE MOON. 10. When the moon is seen through a telescope,mountains and valleys appear on its surface. Some ofthe mountains are four or five miles high, and are ofgreat extent. The heights of these mountains havebeen ascertained, by observations on the shadows whichthey cast.…
Astronomy
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