Samara's Space Crossword Puzzle

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Across
  1. 1. cold desert planet that is half the size of our planet
  2. 4. another name for the North Star
  3. 6. the measure of the amount of matter in an object
  4. 9. can either be planetary or stellar of this planet
  5. 10. a large spacecraft that orbits our planet
  6. 12. a rocky planet
  7. 13. A large telescope in space
  8. 15. the last major planet in our Solar System
  9. 16. the distance light travels in one year
  10. 17. the galaxy we live in
  11. 21. star groups that make a certain shape
  12. 22. one proton and one electron
  13. 23. orbits a moon or star
  14. 24. planet we live on
  15. 25. contains stars and planets
  16. 26. draws objects towards it
Down
  1. 2. brightest star in southern Constellation.
  2. 3. first spacecraft that crossed the helioshere
  3. 5. Mercury,Venus, Earth, Mars, Jupiter, etc.
  4. 7. a very hot star that the Earth orbits
  5. 8. the region beyond Neptune in our Solar System
  6. 11. the time t takes the space station to go around earth
  7. 14. black circular shape that pulls in gravity.
  8. 18. a circular path an object makes around another one
  9. 19. a constellation in the Northern Hemisphere
  10. 20. the tendency to do nothing
  11. 23. The Sun is a_____
  12. 27. the second planet from the sun