The Solar System

What planets are visible to the naked eye?
Answered by Science Channel
  • Science Channel

    Science Channel

  1. Humans have known about the planets Mercury, Venus, Mars, Saturn and Jupiter since prehistoric times, as all five are visible to the naked eye. Our solar system's other planets, however, remained unknown till the invention of the telescope. Astronomer William Herschel discovered Uranus in 1781. Mathematician Urbain Jean Joseph Le Verrier predicted the location of Neptune, which was then confirmed by astronomer Johann Gottfried Galle in 1846. Astronomer Clyde W. Tombaugh discovered dwarf planet Pluto in 1930.

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