Space Crossword Puzzle

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Across
  1. 4. A group of many solar systems.
  2. 6. The thing that is inbetween Mars and Jupiter.
  3. 9. What the planets in our solar system orbit.
  4. 11. Farthest planet away from the sun in our solar system.
  5. 12. The smallest planet in our solar system.
Down
  1. 1. A dwarf planet in our solar system that used to be a normal planet.
  2. 2. What is a person who goes into space called?
  3. 3. The ____ orbits the Earth.
  4. 5. What the sun is composed of.
  5. 7. A thing in space where gravity is so strong, not even light can escape it.
  6. 8. The biggest planet in our solor system.
  7. 10. The hottest planet in our solar system.