Megan's Science Crossword Puzzle

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Across
  1. 3. meteor that reaches earth's surface
  2. 4. the inner planets are called ____
  3. 7. coldest planet
  4. 9. chunks of rock floating through space
  5. 10. leftover remains from the formation of the solar system
Down
  1. 1. long dust trail
  2. 2. the first scientist to believe in the heliocentric system
  3. 5. celestial body orbiting the sun
  4. 6. closest planet to the sun
  5. 8. "the big dipper"