observing the solar system

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Kepler discovered that the orbit of each planet is a ____ rather than a circle.

ellipse

an earth-centered system of planets is known as a ____ model

geocentric

the sun-centered system of planets developed by Copernicus is an example of a_____ model

heliocentric

and object's _____ tends to keep a moving object continuing in a straight line and a stationary object in place.

inertia

Astronomy

known as the study of the universe

Johannes Kepler

laws of planetary motion

Nicholas Copernicus

a sun-centered universe

Ptolemy

an earth-centered universe

Isaac Newton

the laws of gravity

Galileo Galilee

turning a telescope to the sky


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