Heinrich d'Arrest
Heinrich d'Arrest was a German astronomer and assistant to Johann Gottfried Galle at the Berlin Observatory. He played a crucial role in the discovery of Neptune by aiding in the observations that confirmed the planet's existence shortly after its predicted position was calculated by Urbain Le Verrier.
Born on Mar 13, 1822 (203 years old)
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Heinrich d'Arrest assisted Johann Gottfried Galle in confirming the discovery of Neptune.
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