Thomas Wright. An Original Theory or New Hypothesis of the Universe, 1750
Conversation
Fiat Firmamentum, by Francisco de Holanda, from 'De Aetatibus Mundi Imagines', circa 1545
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Diagram of an eclipse of the sun, with the moon casting a shadow cone, c. 1260
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Replying to
Thomas Wright. An Original Theory or New Hypothesis of the Universe, 1750
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'The Sun as revealed by telescope and spectroscope.'
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