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 158
ened by the penumbra, and the edge of theshadow itself, when it first touches the moon, appears nearlyblack by contrast with the bright parts of the moons surface.To the naked eye the outline of the shadow looks fairly sharp,but even with a small telescope it appears indefinite, and witha large… … §198] COMPUTATION OF A LUNAR ECLIPSE. 147 After the moon has wholly entered the shadow, her disc isusually distinctly visible, illuminated with a dull copper-colored light, which is sunlight deflected around the earth intothe shadow by the refraction of our atmosphere, as illustratedby Fig. 39. The…
Astronomy
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