Space words

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Across
  1. 3. something artificially put into Earth's atmosphere by humans
  2. 4. the largest planet in our solar system
  3. 6. a small body floating around in space
  4. 8. The empty void that holds everything
  5. 11. the universal force of attraction acting between all matter
  6. 12. spheroid of Plasma that is held together by it's own gravity
  7. 13. Pluto is a ______
  8. 18. a gravitational bound system between our planets and the sun
  9. 22. a person whose job is to go into space
  10. 23. a small body in Earth's atmosphere
  11. 25. the galaxy that includes our solar system
  12. 26. the distance light travels in one year
  13. 27. the study of everything outside of Earth's atmosphere
  14. 28. the international space station
Down
  1. 1. a region of space between the orbits of Mars and Jupiter
  2. 2. a gravitational bound system between solar systems
  3. 5. an icy body in Earth's atmosphere
  4. 7. an optical instrument designed to make distant objects appear nearer
  5. 9. this planet is considered a dwarf planet
  6. 10. the planet that we live on
  7. 14. last name of the first man on the moon
  8. 15. a large body in Earth's atmosphere
  9. 16. the fourth planet from the sun
  10. 17. Earth is a _____
  11. 19. the closest star to Earth
  12. 20. the first spacecraft to carry humans to the moon successfully
  13. 21. the planet in our solar system with what looks like a ring around it
  14. 24. a solid piece of debris from an object, such as a comet, asteroid, or a meteor