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Planetary Motion

Teacher: Diane Page
Across
The shape of planetary orbits
(two words) The time it takes for a planet to make one complete revolution around the Sun
Newton's famous "Law of Universal ..."
Famous scientist who theorized the Sun is the center of the universe
Down
The very early belief that the Earth was the center of the universe
The accepted fact that the Sun is the center of the universe
Proved Kepler's theory that planets move faster as they get closer to the Sun
Famous mathematician who theorized that the planets' orbits around the Sun are elliptical rather than perfect circles
An object in motion will stay in motion unless a force acts upon it