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Urbain Jean Joseph Le Verrier was a French mathematician who, beginning in 1838, studied the causes of perturbations in the Solar System. His work led to improved knowledge of the masses of the planets, the scale of the Solar System, and the velocity of light. He also predicted the existence of two new planets – one of which was subsequently confirmed. In 1845 he learned from François Arago of certain irregularities in the movements of Uranus, which hinted at the existence of an eighth planet. LeVerrier's calculated position of this perturbing body enabled Johann Galle to confirm it observationally, though John Adams had made a similar but unpublished prediction some months earlier. LeVerrier, not one to avoid publicity, suggested that Uranus be renamed for Heschel, the finder, and that the new discovery be named after himself. In the event, man lost out to (Roman) god and the eighth planet was called Neptune. Leverrier's other prediction, first made in 1845, was for a new innermost planet, which became known as Vulcan. Searches turned up nothing and we now know that the irregularities in Mercury's orbit are an effect of general relativity....
 
 
Urbain Jean Joseph Le Verrier was a French mathematician who, beginning in 1838, studied the causes of perturbations in the Solar System. His work led to improved knowledge of the masses of the planets, the scale of the Solar System, and the velocity of light. He also predicted the existence of two new planets – one of which was subsequently confirmed. In 1845 he learned from François Arago of certain irregularities in the movements of Uranus, which hinted at the existence of an eighth planet. LeVerrier's calculated position of this perturbing body enabled Johann Galle to confirm it observationally, though John Adams had made a similar but unpublished prediction some months earlier. LeVerrier, not one to avoid publicity, suggested that Uranus be renamed for Heschel, the finder, and that the new discovery be named after himself. In the event, man lost out to (Roman) god and the eighth planet was called Neptune. Leverrier's other prediction, first made in 1845, was for a new innermost planet, which became known as Vulcan. Searches turned up nothing and we now know that the irregularities in Mercury's orbit are an effect of general relativity....

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    Neptune, 8th Planet from the Sun
  Neptune, 8th Planet from the Sun
Neptune is the eighth planet from the Sun and the fourth largest (by diameter). Neptune is smaller in diameter but larger in mass than Uranus. In Roman mythology Neptune (Greek: Poseidon) was the god of the Sea. After the discovery of Uranus,...
 
    Galle, Discovery Neptune - 1846
  Galle, Discovery Neptune - 1846
Johann Gottfried Galle was a German astronomer at the Berlin Observatory who, with the assistance of student Heinrich Louis d'Arrest, was the first person to view the planet Neptune, and know what he was looking at, on 23 September, 1846. He used the...
 
    John Adams, Predicted Neptune - 1841
  John Adams, Predicted Neptune - 1841
John Adams was an English mathematician and astronomer who predicted the existence of Neptune. While a student at Cambridge he wrote this note (found only after his death) dated Jul. 3, 1841: Formed a design at the beginning of this week of investiga...
 
    D'Arrest, Co-discovery Neptune - 1846
  D'Arrest, Co-discovery Neptune - 1846
Heinrich Louis d'Arrest was a German astronomer, born in Berlin. While still a student at the University of Berlin, d'Arrest was party to Johann Gottfried Galle's search for Neptune. On September 23, 1846, he suggested that a recently drawn chart of...
 
       
 
         
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