| 1. Now that Pluto is no longer included, how many planets are there in the Solar System? | 
| 2. What is the smallest planet in the Solar System? | 
| 3. What is the largest planet in the Solar System? | 
| 4. What is the hottest planet in the Solar System? | 
| 5. The sixth planet from the Sun features an extensive ring system, what is the name of this planet? | 
| 6. The chemical element uranium was named after what planet? | 
| 7. What planet in the solar system is farthest from the Sun? | 
| 8. What is the second smallest planet in the solar system? | 
| 9. What planet is closest in size to Earth? | 
| 10. The moon Titan orbits what planet? | 
| 11. What planet is nicknamed the ‘Red Planet’? | 
| 12. True or false? Neptune is larger than Saturn. | 
| 13. The Galilean moons orbit what planet? | 
| 14. What planet is closest to the Sun? | 
| 15. What is the seventh planet from the Sun? | 
| 16. True or false? Venus has more atmospheric pressure than Earth? | 
| 17. Triton is the largest moon of what planet? | 
| 18. What is the brightest planet in the night sky? | 
| 19. What is the third planet from the Sun? | 
| 20. Phobos and Deimos are moons of what planet? |