Galileo's notebooks may reveal secrets of new planet

Galileo knew he had discovered a new planet in 1613, 234 years before its official discovery date, according to a new theory by a University of Melbourne physicist.

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<p><a href="http://www.physorg.com/news166355079.html">Galileo's notebooks may reveal secrets of new planet</a></p> <p>Galileo knew he had discovered a new planet in 1613, 234 years before its official discovery date, according to a new theory by a University of Melbourne physicist.</p>