Adriana

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Across
  1. 4. rocky debris that collides with our atmosphere, creating colorful streaks
  2. 7. the shape of a planets orbit
  3. 8. a region of space between the orbits of Mars and Jupiter
  4. 10. long cliffs on mercury's surface
  5. 11. the area around a star where it is not too hot and not too cold for liquid water to exist
  6. 12. the average distance between Earth and the Sun
  7. 13. orbital or rotational motion of an object in the direction opposite the rotation of its primary
  8. 15. lumps of rock or iron that orbit the sun
  9. 16. the main constituent of gas giant planets
  10. 17. a doughnut-shaped region of icy objects beyond the orbit of Neptune
Down
  1. 1. large planet mostly composed of helium and/or hydrogen
  2. 2. Earth-like planets made up of rocks or metals with a hard surface
  3. 3. has not cleared the neighborhood around its orbit and is not a moon
  4. 4. a small body of matter from outer space that enters the earth's atmosphere
  5. 5. a rock-type object formed in the early solar system from collisions
  6. 6. space rocks that fall to Earth's surface
  7. 9. a measure of how non-circular the orbit of a body is
  8. 14. large objects made of dust and ice that orbit the Sun