Universe crossword

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Across
  1. 4. the explosion of a star
  2. 5. basically a tiny universe inside of the real universe. comprised of nebulae and solar systems
  3. 6. a forming solar system
  4. 8. a spinning disk inside a galaxy comprised of a central star (sun) and planets orbiting it. (two words)
  5. 11. when something is moving away it appears red
  6. 12. the ever-expanding area the big bang created
Down
  1. 1. the most commonly found element in the universe
  2. 2. anything the human can interact with its senses there is a tiny more amount of it than anti-matter
  3. 3. a mass that is orbiting around a star
  4. 7. the small particles that make up interstellar clouds (two words)
  5. 9. any celestial body orbiting a planet
  6. 10. mainly made of helium and hydrogen. giant heat mass balls