Cosmic Crossword

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Across
  1. 4. The star at the centre of our solar system.
  2. 6. A large object that travels around a star, such as Earth or Mars.
  3. 7. The science that studies stars, planets, and space.
  4. 9. The brightest star we can see in the night sky.
Down
  1. 1. A pattern made by a group of stars that forms a picture in the sky.
  2. 2. Someone who might use stars to help them steer a ship.
  3. 3. A very large group of stars held together by gravity.
  4. 5. The star that helps people find north and stays in almost the same place.
  5. 8. Everything that exists in space, including stars, planets, and galaxies.