Solar System Online Test

1. What characteristic makes Mercury unique among the terrestrial planets?

2. What is the name of the moon of Pluto discovered in 2005 and named after the ferryman of the underworld in Greek mythology?

3. What is unique about Uranus's rotation axis compared to other planets in the Solar System?

4. Which moon of Jupiter is thought to have a subsurface ocean beneath its icy crust, similar to Europa, but with a greater depth and complexity?

5. Which spacecraft was the first to visit Mercury?

6. Which dwarf planet was the first to be discovered beyond Pluto's orbit in the Kuiper Belt?

7. What is the name of the intense radiation belt surrounding Jupiter?

8. Which space probe conducted a flyby of Pluto in 2015, providing the first close-up images of the dwarf planet?

9. What is the name of Kepler's second law of planetary motion?

10. What is the largest gap in Saturn's rings, located between the A ring and the B ring?

11. Which dwarf planet is notable for its elongated shape and rapid rotation?

12. What is the name of the phenomenon where tidal forces cause a celestial body to become elongated along the axis pointing toward the attracting body?

13. What is the name of the largest volcano in the solar system, located on Mars?

14. Which moon of Jupiter is the largest moon in the Solar System, even larger than the planet Mercury?

15. Which spacecraft conducted the first soft landing on the far side of the Moon in 2019, deploying the Yutu-2 rover?

16. Which space probe was the first to visit the asteroid belt and to make direct observations of Jupiter?

17. What is the name of the spacecraft that discovered geysers erupting from beneath the icy surface of Saturn's moon, Enceladus?

18. Which space telescope is set to succeed the Hubble Space Telescope and is designed to observe the universe in the infrared spectrum?

19. What is the primary component of Neptune's atmosphere?

20. What is the name of the spacecraft that orbited Saturn and its moons, providing detailed observations and data?

21. How do solar storms, like coronal mass ejections, affect the occurrence of auroras?

22. What is the Kuiper Belt?

23. Which space probe is currently studying the polar regions and atmosphere of Mars, searching for signs of past or present life?

24. Which type of comets are believed to originate from the Oort Cloud?

25. Which comet is known for its exceptionally long tail and was visible to the naked eye for several months in 1997?

26. Which space probe conducted the first flyby of Saturn and provided detailed images of its rings and moons?

27. What is the name of the moon of Pluto discovered in 2011 and named after the three-headed dog that guards the entrance to the underworld in Greek mythology?

28. Which instrument on spacecraft is used to measure the impact of the solar wind on Earth's magnetosphere?

29. Which moon of Saturn is known for its thick atmosphere and lakes of liquid methane and ethane on its surface?

30. Which moon of Jupiter is known for its bright, highly reflective surface and its distinctive grooved terrain?