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9 Cards in this Set
- Front
- Back
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A symmetrically shaped oval is an ___.
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ellipse
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Two central points of an ellipse are called ___.
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foci
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Name the man who formulated the three laws of planetary motion.
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Kepler
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Name the unit for the distance between the earth and the sun.
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astronomical unit
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What English scientist discovered gravity?
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Newton
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Name the first planet discovered in modern times.
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Uranus
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What heavenly body did Ptolemy believe was the center of the universe?
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Earth
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Name the planet last to be discovered.
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Pluto
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What heavenly body did Copernicus believe to be the center of the universe?
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the sun
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