universe

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Across
  1. 3. 2 nuclei collide and form 1 larger atom
  2. 4. Many galaxies are moving away from each other
  3. 7. furthest from the sun.
  4. 9. is one of the first elements
  5. 10. creation of our universe
  6. 11. Many planets or celestial bodies surrounding a sun.
  7. 12. Closest to the sun
Down
  1. 1. 1 large atom splits making 2 smaller atoms.
  2. 2. a system of millions of stars held together by gravity
  3. 5. celestial body of gas that shines by radiation derived from its internal energy source.
  4. 6. degree held by gravity forming clump masses
  5. 8. is one of the first elements