Star Cycle

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Across
  1. 3. the North star
  2. 7. a huge collection of gas dust and stars
  3. 10. the planet we live on
  4. 11. helps bring together international flight crews
  5. 12. a region of stars visible during winter in the northern hemisphere
  6. 15. an icy solar body
  7. 16. a telescope that has been put into space and helps us explore earth within 24 hours
  8. 17. a heavenly body occurring naturally as a physical entity
  9. 21. a triple star system in the southern consellations
  10. 23. a object in space that resembles a plant but lacks the criteria to become and actual planet
  11. 24. the galaxy that has earth
  12. 25. the first spacecraft to cross the heilosphere
  13. 27. the thing that keeps us on earth so we don't just fly off
  14. 28. based on the amount of matter in an object
Down
  1. 1. a unit to measure the distance light travels
  2. 2. a group of stars that form an imaginary shape in the sky
  3. 4. a thing in the sky made of gas
  4. 5. defies the boundary where the velocity needed to escape exceeds the light
  5. 6. a barred spiral galaxy
  6. 8. a manmade object we put into space
  7. 9. a region of stars that is beyond the orbit of Neptune
  8. 13. the first law created by Issac Newton
  9. 14. a giant cloud of gas
  10. 18. a celestial object that orbits the sun
  11. 19. the amount of time it takes the ISS to make a full rotation around earth
  12. 20. stars and gas clouds in one or more spiral arms
  13. 22. a clean alternative to methane
  14. 26. the curved path of a celestial object