Big Bang

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Across
  1. 3. Gas cloud that gives birth to a star
  2. 4. Explosion that results from the death of a large star
  3. 5. Large space rocks
  4. 13. Evidence that suggested the universe was stretching or expanding
  5. 14. The big bang was 13.7____________ years ago
  6. 15. Leftover thermal energy from the big bang
  7. 17. Fundamental force in the galaxy
Down
  1. 1. Consists mostly of empty space
  2. 2. Matter that doesn't give off electromagnetic radiation
  3. 6. Period immediately after the big bang
  4. 7. Jovian planet know for its rings in our solar system
  5. 8. Balls of gases that produce light and heat
  6. 9. Objects moving away from the Milky Way give off a wave of light
  7. 10. The spark that started it all
  8. 11. Particle that makes up protons and neutrons
  9. 12. The most abundant element of stars and the universe
  10. 16. Extremely dense with such high gravity that light cannot escape