THE UNIVERSE

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Across
  1. 3. The period of time when it is dark
  2. 4. To arrive on the ground or other surface after moving down through the air
  3. 5. The hottest planet in the solar system
  4. 9. An area of darkness, caused by light being blocked by something
  5. 10. A large cylindrical object that moves very fast and is used for space travelling
  6. 13. The farthest planet from the sun
  7. 14. The force that attracts objects towards one another, especially the force that makes things fall to the ground
  8. 15. Moon phase in which it is becoming smaller
Down
  1. 1. A person who has been trained for travelling in space
  2. 2. An occasion when the sun disappears from view, either completely or partly, while the moon is moving between it and the Earth
  3. 6. A bright light that travels through the Earth's atmosphere
  4. 7. The biggest planet in the solar system
  5. 8. To shine repeatedly, to be bright
  6. 11. A strong, hard hat that covers and protects the head
  7. 12. Moon phase in which it is growing