1. How many planets are in our solar system?

2. Which scientist proposed the laws of motion?

3. What is the study of earthquakes called?

4. What is the heaviest naturally occurring element?

5. What is the freezing point of water in Fahrenheit?

6. What is the point of no return around a black hole called?

7. What nickname did Albert Einstein give to quantum entanglement?

8. Does time pass faster or slower in a stronger gravitational field compared to a weaker one?

9. What powers the incredible energy output of a quasar?

10. Why was Pluto reclassified as a 'dwarf planet' in 2006?

11. What does Hubble's Law state about the relationship between a galaxy's distance and its velocity?

12. What essentially 'froze' the sound waves of the early universe into the BAO we see today?

13. How long is the average solar cycle?

14. The Alcubierre Drive is a theoretical model for which technology?

15. The search for Planet X ultimately led to the discovery of which celestial object in 1930?

16. What key criterion caused Pluto to be reclassified as a dwarf planet in 2006?

17. Which region of the solar system contains many icy bodies whose unusual orbits sparked the Planet Nine hypothesis?

18. What is the Kuiper Belt primarily composed of?

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

20. Many of the early orbital irregularities attributed to Planet X were later explained by what?