Space Crossword

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Across
  1. 5. to travel around
  2. 6. a structure in space made of gases in which nuclear fusion reactions occur
  3. 8. full journey around the sun
  4. 9. the planets furthest from the sun
  5. 10. a meteoroid that has entered Earth's atmosphere
  6. 13. a round depression formed on the surface of a planet by a meteorite
  7. 14. the planets closest to the Sun
  8. 15. a meteoroid that strikes a planet or a moon
Down
  1. 1. full turn or complete spin
  2. 2. orbiting objects made of gas, dust, and ice
  3. 3. small, rocky objects in space
  4. 4. when a planet's atmosphere traps solar energy and causes the surface temps. to rise
  5. 7. small, rocky particle that moves through space
  6. 11. distance of 150 million km. from Earth to the Sun
  7. 12. has less mass than any of the eight planets, orbits the sun, and is not a moon