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9 Cards in this Set

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