Ainslees Crossword puzzle

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Across
  1. 1. quantitative measure of inertia
  2. 8. a path that one object in space takes around another one
  3. 9. the fifth zodiac sign
  4. 10. the chemical element of atomic number 1
  5. 13. brings together international flight crews, multiple launch vehicles, globally distributed launch
  6. 16. A system of billions of stars
  7. 17. a doughnut-shaped region of icy bodies extending far beyond the orbit of Neptune
  8. 18. the zodiac sign for birthdays between June 21 - July 22
  9. 19. an object in space that orbits or circles around a bigger object
  10. 20. The little dots you can see in the sky at night
  11. 23. a triple star system in the southern constellation of Centaurus
  12. 24. the zodiac sign for birthdays between 23rd October and 1st November
  13. 25. A giant cloud of gas and dust in space
Down
  1. 2. a barred spiral galaxy and is the nearest major galaxy to the Milky Way
  2. 3. it explores the universe 24 hours a day, 7 days a week
  3. 4. A galaxy that includes the solar system
  4. 5. a property of matter by which it remains at the state of rest or in uniform motion
  5. 6. The force by which a planet draws objects to the center
  6. 7. the zodiac sign for birthdays between November 22 - December 21
  7. 9. The distance light travels in 1 earths year
  8. 11. a star in the northern circumpolar constellation of Ursa Minor
  9. 12. The first spacecraft to cross the heliosphere
  10. 14. one and a half hours in minutes
  11. 15. a group of stars forming a recognizable pattern
  12. 21. There are 8 of these in our solar system
  13. 22. an astronomical object with a gravitational pull so strong that nothing can escape it
  14. 26. the planet that humans live on
  15. 27. the zodiac sign for birthdays between March 21 - April 19