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Showing posts from October, 2015

planetary system

Until 1781, humans had believed there to be only six planets (including Earth) in the solar system. Although many eminent astronomers had previously spotted the planet Uranus, they had always presumed it to be just another star and listed it as such. In March 1781, William Herschel made a series of parallax observations through his telescope and believed he had discovered a comet. On 26th April that year, he reported his find. Only after feedback on his report from the Astronomer Royal and independent confirmation from European astronomers, did he finally concede he had discovered a new planet. After some discussion, Berlin astronomer, Johann Elert Bode, named the planet Uranus. Herschel brought the number of planets in the solar system to seven. Later, Alex Bouvard noticed some unexpected perturbations in Uranus’s orbit and predicted the existence of yet another planet. Johann Galle visually confirmed Neptune’s presence in September 1846 and brought the number of planets to eight. No,