Science universe crossword

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Across
  1. 4. it appears on earth but not in space, its very strong
  2. 6. early stage of a planet still in making
  3. 7. something that once collided with earth
  4. 9. a large cloud of dust where is star is born
  5. 10. dust. What’s left when stars leave
  6. 13. The curved path of an object
  7. 14. everything that exists all in one
  8. 15. metal central to earths core
Down
  1. 1. explosive death of stars
  2. 2. explosive origin of everything
  3. 3. A fixed luminous point in the night sky
  4. 5. icy traveler with a glowing tail
  5. 6. Large object orbiting a star
  6. 8. Massive system of stars ,gas and dust
  7. 11. space rock with a big impact
  8. 12. satellite that controls tides and lights up in the dark