Short History of Astronomy
From The Art and Popular Culture Encyclopedia
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Note 183 page 117. The reference here is plainly to Leonardo da Vinci (see note 96). His contemporaries would naturally regard as chimerical such devices as steam cannon, paddle wheels for boats, and flying machines, or such hints as that contained in his Codex Atlanticus, where he suggests the possibility of steam navigation. “He was the first to explain correctly the dim illumination seen over the rest of the surface of the moon when the bright part is only a thin crescent. He pointed out that when the moon was nearly new, the half of the earth which was then illuminated by the sun was turned nearly directly towards the moon, and that the moon was in consequence illuminated slightly by this ‘earthshine,’ just as we are by moonshine. This explanation ... tended to break down the supposed barrier between terrestrial and celestial bodies.” Arthur Berry’s “Short History of Astronomy” (London, 1898), p. 91.
