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