Galileo (1564-1642) was an astronomer, philosopher,
mathematical and physical one of the fathers of the scientific revolution. After publishing studies
of Geometry, mechanics, mathematics, invent a water pump, the first thermometer and discover the
law of uniformly accelerated movement (physics), learned that in Holland had invented a lens that
allowed seeing Distant Objects. Then he dedicated himself to experimenting with lenses in a tube. Thus, it managed to manufacture
a telescope much better than the Dutchman did, as it had six and not three increases; the objects were not "head down" and distorted, but clear and in their
correct position. Galileo manufactured 60 telescopes, of different qualities and increases. Besides, to the maritime and warlike applications the telescope (it
allowed to see in the distance to the ships or armies that approached so that Venice appointed him professor of for life with a good salary). Galileo with him
scrutinized the sky, and so was the first human being to observe that the moon has valleys and mountains; that Venus has satellites; that the Milky Way is not a
cloud but which is composed of millions of stars.
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