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Galileo Telescope


Galileo Telescope (Credit:eskipaper.com)

Galileo made improvements on the telescope and used it for astronomy. He published his observations on Moon, Jupiter and Milky Way in his book, Sidereus nuncius, The Starry Messenger.

These findings and later observations eventually replaced the geocentric Ptolemaic model of the universe with heliocentric model as put forth by Copernicus. (Credit:atnf.csiro.au)