Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 159
one of the most conspicuous of thecraters, and is taken from a photograph by Prof.Ritchey. There is very conclusive evidence that the Mooncan have but a very slight atmosphere, not morethan one thousandth part of that which the Earthpossesses. Moonlight when examined by the spec-troscope is found… … Diag. LX1X.—Copernicus. in depth and density. The absence of any refractionwhen the Moon passes in front of and occults a staris further evidence that it has no atmosphere, orat most an extremely small one. No clouds or hoarfrost are seen, and we therefore conclude there is nowater. Without air and…
Astronomy
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