![Galileo Gallilei Image source: Justus Sustermans Galileo Gallilei Image source: Justus Sustermans](http://www.timeone.ca/wp-content/uploads/2012/06/Galileo-Galilei.jpg)
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Justus Sustermans
Galileo Galilei was a 17th-century Florentine mathematician who saw Jupiter’s moons move and said so.
Quotes by Galileo Gallilei in Time One
[T]his grand book, the universe … is written in the language of mathematics.