Solar System Vocab

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Across
  1. 5. a large planet composed mainly of gas
  2. 7. a planet having a rocky surface like Earth’s
  3. 8. an object orbiting a star that is round, not itself a star, and large enough to have cleared the area around it of small objects
  4. 9. a flattened circle
  5. 11. the period of time that it takes a planet to complete one revolution around its star
Down
  1. 1. any of the four planets closest to the Sun (Mercury, Venus, Earth, and Mars)
  2. 2. the path of one body around another body, such as the path of Earth around the Sun
  3. 3. a star and the objects that orbit it
  4. 4. any of the four planets farthest from the Sun (Jupiter, Saturn, Uranus, and Neptune)
  5. 6. the layers of gases surrounding a planet, moon, or sun
  6. 10. the force of attraction between all objects in the universe