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German astronomer. In 1846 at the Berlin observatory he discovered the planet Neptune, evidence of which had been passed to him by Urbain Le Verrier (1811-1877). Neptune’s discovery was considered an exciting validation of new theories of celestial mechanics. More at: History

“I met a dead corpse of the plague, in the narrow alley just bringing down a little pair of stairs. But I thank God I was not much disturbed at it.”