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Hands On Mineral Identification helps you to identify over 14,500 minerals! By M. Darby Dyar, Ph.D. See our DVD collection.

Who discovered all the planets?

Most of the planets have been known about for a long time. Only three were really "discovered."

Uranus was found in 1781 by William and Caroline Herschel. Lots of people had already seen it, but no one knew it was a planet.

John Couch Adams guessed that Neptune existed by doing lots of math calculations. In 1846, Neptune was actually found.

Clyde Tombaugh found Pluto in 1930 by taking lots of pictures of the sky. He looked for anything that moved, and found Pluto.


Submitted by RG (Colorado, USA)
(November 13, 1998)



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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA