Solar System

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Across
  1. 5. the planet eighth in order from the Sun
  2. 6. the name often given to the four inner planets
  3. 10. the collection of eight planets and their moons in orbit around the sun
  4. 11. a celestial body moving in an elliptical orbit around a star
  5. 13. the planet closest to the sun and one of the hottest planets
  6. 14. the name often given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune
  7. 15. a force that moves rocks and other materials; the force that pulls objects toward each other
Down
  1. 1. a celestial body resembling a small planet but lacking certain technical criteria
  2. 2. a planet whose orbit lies outside the asteroid belt
  3. 3. a planet whose orbit lies within the asteroid belt
  4. 4. the path of an object as it revolves around another object in space
  5. 7. a unit of measurement equal to 149.6 million kilometers
  6. 8. between the orbits of Mars and Jupiter, where many asteroids are found
  7. 9. an oval shape, which may be elongated or nearly circular
  8. 12. the fourth planet in order from the Sun