Earth & Space Science Crossword

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Across
  1. 2. the theory of the universes beginning
  2. 4. a point of no return
  3. 5. a cloud of gas and dust in outer space
  4. 6. the creation of new atomic nuclei
  5. 10. a young star still gathering mass
  6. 11. a system of stars
  7. 13. earths only natural satellite
  8. 14. relating to stars
  9. 15. consists of positive and neutral neutrons
  10. 16. protons and neutrons
Down
  1. 1. all of space and time and their contents
  2. 3. a large astronomical body that is neither a star nor a stellar remnant
  3. 4. an essential or characteristic part of something abstract
  4. 7. a fixed luminous point in the night sky which is a large
  5. 8. the curved path of a celestial object
  6. 9. relating to the universe or cosmos
  7. 12. a type of energy that is all around us and takes many forms