Across
- 1. What is the coldest planet in the solar system
- 3. Which planet is known as the dwarf planet
- 5. Who discovered Jupiter's four moons?
- 7. Who was the first person to walk on the moon
- 9. What's the biggest planet in the solar system?
- 10. for this planet one day is longer than a year
Down
- 2. This planet was named after the Roman god of the sea
- 4. Which planet is the sister planet of the earth?
- 6. How many rings are around Saturn
- 8. Which planet has the weakest gravitational pull