Solar System

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