Allie and Amelie r slay

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Across
  1. 2. An object that orbits a planet or star and is human-made
  2. 5. An imaginary line through an object around which it spins
  3. 6. A half of the Earth, either north or south of the Equator
  4. 7. The phase when the sunlit side of the Moon is facing towards Earth
  5. 8. A planet made up mostly of gases, such as hydrogen and helium
  6. 10. Sunlight that hits the Earth's surface at a high angle
  7. 13. A model of the Solar System in which Earth is at the centre
  8. 15. Sunlight that hits the Earth's surface at a low angle
  9. 16. The time it takes a planet to rotate once
  10. 17. An event where one object in space blocks another from view
  11. 18. An imaginary line halfway between the North and South Poles
Down
  1. 1. The phase when the Moon is waxing and half of the sunlit side can be seen
  2. 3. When the Moon passes into the Earth's shadow
  3. 4. A model of the Solar System in which the Sun is at the centre
  4. 8. A group of millions or billions of stars
  5. 9. A large space rock that orbits the Sun
  6. 11. An attractive force between any two objects that have mass
  7. 12. A planet made up mostly of icy materials
  8. 13. Any phase when more than half of the sunlit side of the Moon can be seen
  9. 14. Any phase when less than half of the sunlit side of the Moon can be seen