A Family Of Planets Crossword Puzzle

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  • eclipse: an event in which the shadow of one celestial falls on another.
  • satellite: a natural or artificial body that revolves around a planet.
  • phases: the change in the sunlit area of one celestial body as seen from another celestial body.
  • meteor: a bright streak of light that results when a meteoroid burns up in earth's atmosphere.
  • comet: a small body of ice, rock, and cosmic dust that follows an elliptical orbit around the sun and gets tail as it passes the sun.
  • meteorite: a meteoroid that reaches the earth's surface without burning up completely.
  • gas giant: a planet that has a deep, massive atmosphere, such as jupiter, saturn, uranus, or neptune.
  • astronomical unit: the average distance between the earth and the sun; approximately 150 kilometers.
  • meteoroid: a relatively small rocky body that travels through space.
  • terrestrial planet: one of the highly dense planets nearest to the sun; mercury, venus, mars, and earth.
  • prograde: a clockwise spin of a planet or moon as seem from above the plants north pole.
  • retrograde: the counterclockwise spin of a planet or moon as seem from above the plant's north pole; rotation in the same direction as the sun's rotation.
  • inner planet: any of the four planets closest to the sun: mercury, venus, earth, or mars.
  • outer planet: any of the four planets with orbits outside the orbit of mars, namely, the planets jupiter, saturn, uranus, and neptune.
  • ptolemy: earth center of the universe; around 127-141 a.d.
  • copernicus: 1200 a.d.; developed the heliocentric theory.
  • newton: universal law of gravity