Unit 4 Vocabulary

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Across
  1. 2. a flaming ball of gas
  2. 4. everything in the universe, including planets, stars, moons, comets, and asteroids
  3. 7. a tool used to explore space and take pictures
  4. 8. eight planets orbiting the Sun including the planet Earth
Down
  1. 1. a large, round object that circles a star
  2. 2. a suit that covers the body and keeps space explorers alive
  3. 3. a tool used to make far-away things look bigger and closer
  4. 5. a person who travels to places where no one has been before
  5. 6. the path an object takes around a larger object
  6. 9. a large, natural object that travels around a planet