Puzzle 40: Astronomy and Space

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Across
  1. 5. – Travels through space.
  2. 6. – Neighboring galaxy.
  3. 9. – Space rock entering atmosphere.
  4. 11. – Universe.
  5. 16. – Gas and dust cloud.
  6. 17. – Rocky space object.
  7. 19. – Observes distant objects.
  8. 20. – Exploding star.
  9. 22. – Dense stellar remnant.
  10. 23. – Orbits planet.
  11. 25. – Path around celestial body.
  12. 27. – Force between masses.
  13. 28. – Human in space.
  14. 29. – Luminous celestial body.
Down
  1. 1. – Star group forming pattern.
  2. 2. – Extremely bright galactic nucleus.
  3. 3. – System of stars.
  4. 4. – Region of intense gravity.
  5. 7. – Our galaxy.
  6. 8. – Reaches Earth’s surface.
  7. 10. – Launches objects into space.
  8. 11. – Ice and dust object.
  9. 12. – Famous space telescope.
  10. 13. – Accelerates universe expansion.
  11. 14. – Rotating neutron star.
  12. 15. – Invisible mass.
  13. 18. – Natural satellite.
  14. 21. – Orbits a star.
  15. 24. – Distance light travels in a year.
  16. 26. – Universe origin theory.