Astronomy Unit Crossword

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Across
  1. 1. Has an atmosphere where we can breathe.
  2. 4. Our sun is a huge ball of this.
  3. 6. Days which have equal hours of daylight/night.
  4. 9. All of the planets revolve around this body.
  5. 10. Longest or Shortest days of a year.
Down
  1. 2. When an object rotates on its axis.
  2. 3. A large astronomical body that revolves around a star.
  3. 5. The four inner planets are this characteristic.
  4. 7. Earth's orbit is in the shape of this.
  5. 8. The outer planets are described as this.
  6. 11. A massive ball of hot gas that produces light and heat.