Space Crossword Sienna

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Across
  1. 3. an american space company
  2. 6. the SI base unit of thermodynamic temperature a measurment of heat
  3. 8. a way planets move around in space
  4. 11. the planet seventh in order from the sun
  5. 13. a different word for space
  6. 14. a celestial body moving in an elliptical orbit round a star
  7. 17. group of stars forming a recognizable pattern
  8. 19. fine, dry powder consisting of tiny particles of earth
Down
  1. 1. the sixth planet from the Sun
  2. 2. when the moon gets smaller
  3. 4. the second planet from the sun
  4. 5. a way to get up to space
  5. 7. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
  6. 9. a thing you use to look at space from earth
  7. 10. a substance or matter in a state in which it will expand freely to fill the whole of a container
  8. 12. a thing you see in the night sky from earth
  9. 13. a celestial object consisting of a nucleus of ice and dust
  10. 15. the planet we live on
  11. 16. as cold as it can get
  12. 18. itmeans "moon" in Latin