matilda puzzle

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Across
  1. 3. A group of millions or billions of stars.
  2. 7. A ball of gas that releases light and heat.
  3. 8. A planet made up mostly of gases, such as hydrogen and helium.
  4. 12. A large space rock that orbits the Sun.
  5. 13. A model of the Solar System in which the Sun is at the centre.
  6. 15. Sunlight that hits the Earth's surface at a low angle.
Down
  1. 1. A model of the Solar System in which Earth is at the centre.
  2. 2. A half of the Earth, either north or south of the Equator.
  3. 4. When the Moon passes into the Earth's shadow.
  4. 5. A planet made up mostly of icy materials.
  5. 6. The motion of one object around another because of gravity.
  6. 9. A large natural object that orbits a planet.
  7. 10. A time of year with typical weather patterns and daylight hours.
  8. 11. The galaxy in which the Solar System is located.
  9. 14. The time it takes a planet to rotate once.