The Universe

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Across
  1. 2. Many universes
  2. 4. A system of millions and billions of stars
  3. 7. The universe that can be seen
  4. 9. A completely empty space
  5. 13. The region beyond the Earth's atmosphere.
  6. 14. Matter that cannot be seen
Down
  1. 1. Massive explosion when universe began
  2. 2. The galaxy we live in
  3. 3. A level surface without raised areas
  4. 5. A scientist that studies space
  5. 6. Exaggerated
  6. 8. Shaped like a sphere
  7. 10. Luminous celestial bodies of gas that shine
  8. 11. Has a mass of 330,000 times the earth
  9. 12. An unknown from of energy in the universe