PLANETS and NEBULAE (holy peak)

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Across
  1. 2. a gradual process that creates celestial bodies
  2. 5. a system of planets orbiting a star
  3. 6. A small solid object formed from dust in a protoplanetary disk
  4. 12. a cold spot in a nebula, providing a space for many stars to begin to form simultaneously
  5. 13. a not so solid celestial body with a small metallic core, dense atmospheres, and extreme temperatures
  6. 14. the goat
  7. 15. Earth is one away from the sun
Down
  1. 1. a ring of elements which surrounds a star
  2. 3. the distance threshold from a star where the low temperature causes planets to form as icy or gaseous rather than rocky
  3. 4. a young spherical celestial body of high temperature
  4. 7. a stellar explosion that releases heavy elements into space
  5. 8. a cloud of space dust that contains elements needed to create planets
  6. 9. a young star yet to initiate nuclear fusion
  7. 10. it keeps you down, and assists in bringing things together
  8. 11. everywhere where there's nothing