A voyage in space; a course of six lectures "adapted to a juvenile auditory" delivered at the Royal Institution at Xmas 1913 (1915)
Turner, Herbert Hall, 1861-1930 · London Society for Promoting Christian Knowledge · leaf 81
Fig. 15.—An Ideal Transit of Venus. 60 A VOYAGE IN SPACE there had been just a single instant like II, whichthey could note accurately. Then they would havefound out the Suns distance very exactly. Un-fortunately it was not so, and they knew from pre-vious Transits that it would not be so. Instead… … Fig. 16.—The Black Drop. an appearance like II, they knew they would seesomething like Fig. 16, the black disc being not atall round, but pear-shaped. This does not meanthat Venus is really of that shape, for when it is fullyon the Sun we can see that it is properly round, as inFig. 17; and we also…
Astronomy -- Juvenile literature
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