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Across
  1. 3. , rock and iron objects that orbit the sun
  2. 8. , Mercury, Venus, Earth, and Mars, the 4 closest planets to the sun
  3. 9. , pieces of rock that break off of asteroids and travel through space
  4. 10. , Jupiter, Saturn, Uranus, Neptune, the 4 farthest from the sun
  5. 11. , meteoroids that reach Earth's surface
Down
  1. 1. , made up of a star, planets and other objects that revolve around it
  2. 2. , nearly round bodies whose orbits cross the orbits of other bodies
  3. 4. , a wide region between Mars and Jupiter where millions of asteroids can be found
  4. 5. , a large round body that revolves around a star
  5. 6. , a streak of light caused by a meteoroid burning up
  6. 7. , a chunk of frozen gases, rock, ice and dust