Sir William Herschel discovered the first planet, Uranus, in 1781. In 1846, John Couch Adams discovered Neptune and in 1930, astronomer Clyde Tombaugh discovered Pluto.
Mercury, Venus, Sun, Mars, Jupiter, and Saturn can all be seen from Earth with a naked eye. Ancient Greeks are the ones who are most often credited for discovering them in Western culture. However, since these planets can bee seen from other places on the globe as well, it is unfair to credit only one culture for discovering them. The planets were probably seen by early humans before they even started recording their history.
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