Solar System

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Across
  1. 4. what are planetoids also known as?
  2. 5. What was the name of the first dog which went to space?
  3. 7. Which satellite has cold volcanoes?
  4. 11. In the red giant stage, the sun expands how many times of its original size?
  5. 12. How long does it take for the light rays of the sun take to reach the earth (in minutes)?
Down
  1. 1. which is the biggest satellite of Saturn?
  2. 2. what is another name for the corona?
  3. 3. who went to the moon along with Neil Armstrong?
  4. 6. Which star is the second closest to the Earth?
  5. 8. Around how many years ago did astronomers observe a red spot on the surface of Jupiter?
  6. 9. which is the sphere of colour?
  7. 10. what is the name of the smallest constellation?