Across
- 4. Building block of the first atom.
- 5. The entire cosmos.
- 7. The imaginary surface on which planets form during a nebula.
- 9. Process where small elements become larger elements.
- 11. Small objects that collided to form planets.
- 13. A star 5 times the mass of the sun 'dies.'
- 15. Building block of the first atom.
- 17. Group of debris that seperates the inner and outer planets.
- 19. The event that caused the universe; started from a single point.
- 20. Energy released when the first elements formed.
Down
- 1. Process where large elements become smaller elements.
- 2. The force that causes the universe's expansion to slow.
- 3. The law that says that galaxies are 'redshifting,' or moving away from eachother.
- 4. An oval shaped orbit
- 6. The force that causes a nebula to spin faster as it contracts.
- 8. The force that causes the universe's expansion to speed up.
- 10. Spacial gathering of dust and space matter that forms galaxies.
- 12. Planets that form in the outer nebula; collect most of the material.
- 14. The star located above the celestial north pole.
- 16. material that remains floating in space after planets, moons, and stars form to create a galaxy.
- 18. Object in space that creates elements.