Space Science

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Across
  1. 2. A person who thought Earth was in the center of the universe
  2. 3. A star that emits light when it pulse
  3. 6. Middle of our solar system
  4. 10. Everything in existence. Stars, gases, galaxies, black holes etc
  5. 11. A nuclear reaction in stars to create hydrogen/helium
  6. 12. Gas Giants are considered...
  7. 15. An explosion of a high mass star
  8. 16. The planet we live on
  9. 17. A force that pulls one object to a bigger object
  10. 19. The process of becoming bigger
Down
  1. 1. A person who thought the sun was in the center of the universe
  2. 4. The total energy a star can radiate per second
  3. 5. Planets that do not pass the asteroid belt are...
  4. 6. Massive celestial body
  5. 7. A point with infinite density
  6. 8. A cloud of gas in a galaxy
  7. 9. The study of the universe
  8. 13. The emission of energy as electromagnetic waves
  9. 14. Earliest forms of matter, 1e-16 meters
  10. 18. Any physical substance