Solar System Online Test

1. Which moon of Uranus is known for its unusual, roughly spherical shape, with a diameter about one-third that of our Moon?

2. What is the name of the first successful Mars rover mission, launched by NASA in 1996, which provided valuable data on the Martian surface and atmosphere?

3. Which moon of Saturn is thought to have subsurface oceans beneath its icy crust, similar to Europa and Enceladus?

4. What is the name of the dark, circular feature on the Moon's surface, formed by a volcanic eruption or impact?

5. 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?

6. Which moon of Saturn is believed to have a subsurface ocean beneath its icy crust?

7. What is the name of the largest moon of Saturn?

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

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

10. What is the term for the phase of the Moon when only a small portion of its surface is illuminated, appearing as a thin crescent?

11. What is the term for the gradual wearing away of the Earth's surface by natural processes such as wind, water, and ice?

12. Which of the following is NOT a greenhouse gas?

13. Which moon of Uranus is unique for its extreme axial tilt, causing it to essentially orbit the planet on its side?

14. Which of the following is NOT a type of rock formed by the process of weathering and erosion?

15. Which spacecraft was the first to successfully land humans on the Moon?

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

17. What is the rotational period of Earth?

18. Which planet in the Solar System has a thick atmosphere composed mainly of carbon dioxide, with surface pressures about 92 times that of Earth?

19. Which ground-based telescope is the world's largest single-aperture optical telescope and is located in the Canary Islands, Spain?

20. What is tidal locking?

21. 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?

22. What is the name of the asteroid belt object that was visited by the Japanese spacecraft Hayabusa2?

23. What is the state of Mercury's atmosphere?

24. What is the name of the largest meteorite ever found on Earth?

25. Which planet in the Solar System is known for its massive dust storms that can engulf the entire planet for months?

26. Which layer of the Earth's atmosphere contains the ozone layer?

27. Which space telescope is operated by NASA and the European Space Agency (ESA) and has made significant contributions to our understanding of dark matter and dark energy?

28. Which surface feature on Venus is a vast, elevated region similar to continents on Earth?

29. What is the name of the robotic rover currently exploring the surface of Mars?

30. What was the approximate length of the tail of Comet Hale-Bopp during its peak brightness in 1997?