Beyond Earth

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Across
  1. 3. The center of the disk bulge
  2. 5. Coming together of materials that formed the heavenly bodies
  3. 8. Congregation of solar systems,stars,dusts,ad gases held together by gravity
  4. 10. Most common type of galaxy
  5. 12. Objects formed by accretion
  6. 13. An instrument to further study the sun
  7. 16. Located above the photosphere
  8. 19. Largest supercluster
  9. 21. Nearest stella neighbor of the sun
  10. 23. Consists of a single sun and all objects affected my its gravity
  11. 24. Are composed of small round spheres called chondrules
  12. 25. A huge swirling cloud of interstellar gas
Down
  1. 1. Planets located outside our solar system
  2. 2. Where our solar system can be found
  3. 4. Are the most common type of asteroids
  4. 6. Largest asteroid
  5. 7. Proposed his theory about the expanding universe
  6. 9. Study of celestial objects in the visible band
  7. 11. Largest galaxy
  8. 14. Lies between the orbit of mars and jupiter
  9. 15. Oldest known exoplanet
  10. 17. Are minor planets that circle the sun
  11. 18. Includes Jupiter,Saturn,Uranus,Neptune
  12. 20. Cloud of gas that became the sun
  13. 21. Outer visible layer of the sun
  14. 22. Some asteroids that orbit in the outer solar system