1. How many planets are in our solar system?

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

3. What percentage of the universe is estimated to be composed of Dark Energy?

4. What is a rapidly rotating neutron star that emits regular pulses of radiation called?

5. What is the primary function of the Higgs field in the universe?

6. What is the primary element that stars fuse in their cores during the majority of their lives?

7. What must be able to exist on a planet's surface for it to be considered in the Goldilocks Zone?

8. Which gas is primarily responsible for the common green color seen in an Aurora?

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

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

11. What is it called when a galaxy's light shifts toward longer wavelengths as it moves away from us?

12. At what altitude is the Kármán Line typically set?

13. Which organisms were primarily responsible for the Great Oxidation Event?

14. What is the theoretical radiation emitted by black holes called?

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

16. The hypothesis of Planet Nine is primarily based on what type of scientific evidence?

17. In conspiracy theories, Nibiru is often described as what type of object?

18. Claims about Nibiru are frequently associated with interpretations of which ancient civilization’s mythology?

19. One early reason astronomers believed Planet X might exist was based on irregularities observed in the orbit of which planets?

20. How many officially recognized planets are currently in our solar system?