misson crossword

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Across
  1. 1. A huge collection of stars, gas, and dust held together by gravity
  2. 4. Path an object takes around another in space
  3. 6. Way The galaxy that contains our solar system
  4. 7. A huge explosion that marks the death of a massive star
  5. 8. The star at the center of our solar system
  6. 9. The boundary marking the beginning of outer space above Earth
Down
  1. 1. The force that keeps planets in orbit around the sun
  2. 2. A large, bright object in space made mostly of hydrogen and helium
  3. 3. Earth’s natural satellite
  4. 5. A space traveler
  5. 6. the red planet