1. Which planet is closest to the Sun?

2. What is the study of earthquakes called?

3. What is the heaviest naturally occurring element?

4. What is the only metal that is liquid at room temperature?

5. Dark matter is estimated to make up approximately what percentage of the total universe?

6. What happens to a black hole as it emits Hawking Radiation over time?

7. What does the 'tyranny of the rocket equation' primarily refer to?

8. What type of storm is Jupiter's Great Red Spot?

9. Which organization operates the Large Hadron Collider?

10. At which Lagrange Point is the James Webb Space Telescope (JWST) located?

11. What are the individual packets of light energy called in the Photoelectric Effect?

12. The Oort Cloud is considered the primary source for which type of celestial objects?

13. What happens to a moon that drifts inside its planet's Roche Limit?

14. What did Albert Einstein famously call quantum entanglement?

15. What is the approximate solar mass limit for a stable white dwarf?

16. What three phases coexist at the triple point?

17. What is the name of the spherical shell of icy bodies at the very edge of the Sun's gravitational influence?

18. At what altitude is the Kármán Line, the recognized edge of space, located?

19. What is the Kuiper Belt primarily composed of?

20. What type of celestial object is Pluto officially classified as today?