SCS Outer Space Crossword Puzzle

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Across
  1. 4. On Jupiter and Saturn it rains ______
  2. 6. He discovered the laws of planetary motion
  3. 7. The the smallest planet in our solar system is __
  4. 8. He is known as the “Father of Observational Astronomy”
  5. 10. This constellation is named after a great Greek hunter
Down
  1. 1. This planet is covered by clouds of sulphuric acid
  2. 2. The visible part of the Sun is called the___
  3. 3. The largest moon in our solar system is
  4. 5. Saturn's largest moon is ______
  5. 7. In space, a natural satellite is called a ____
  6. 9. Name of the dog on board the Sputnik 2 in November 1957