-
Earth, Astronomy, Ptolemaic, Universe, Center, Summary
-
-
Scientific Revolution, Mathematician, Artist, Sun, Doctorate
-
Scientist, Measurement, Sextant, Space, Religious, Copemicus
-
Mechanics, Jupiter, Professor, Philosophy, Rate, Moons
-
Earth, Sun, Moon, Habitable, Elliptical, Telescope
-
Newton, Motion, Inertia, Equal, Gravitation, Cooling