Journey to The International Space Station

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Across
  1. 2. the biggest planet
  2. 4. planet we live on
  3. 5. a force that moves an object away
  4. 7. a force that brings an object closer
  5. 9. some light can go through this material
  6. 12. force that pulls objects to the ground
  7. 14. cover protects the astronaut's head
  8. 15. gives off heat and light
Down
  1. 1. no light can go through this material
  2. 3. all light can go through this material
  3. 6. made of billions of stars, gas, and dust
  4. 8. made of rock and soil
  5. 10. air we breathe
  6. 11. object that attract metal
  7. 13. protects the astronauts' eyes when it's too bright