Earth Science pdf free download. What did the ancient Greeks recognize as the universe? In their model, the universe contained Earth at the center, the Sun, the Moon, five planets, and a sphere to which all the stars were attached. This idea held for many centuries until new ideas and better-observing instruments allowed people to recognize that Earth is not the center of the universe. Galileo’s telescope revealed four moons orbiting Jupiter (not Earth) and many more stars than are visible to the naked eye. More importantly, Galileo’s experiments established the principal of inertia which countered the physical arguments the Greeks used against a rotating and moving Earth.
Earth Science pdf free download
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