Big Bang Theory

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Across
  1. 3. a massive collection of stars, dust and clouds of gas
  2. 4. the star at the center of our solar system
  3. 6. What all matter is composed of
  4. 9. Energy measured from the sun measured in microwaves
  5. 10. optical instrument used for seeing distant objects
Down
  1. 1. consists of everything that orbits or travels around the sun
  2. 2. A theory that suggests that our universe is always expanding
  3. 5. the universal force of attraction between all matter
  4. 7. Used to study light
  5. 8. Made up of all matter and space that exist