Solar System Online Test

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

2. Which moon of Saturn exhibits a prominent equatorial ridge that encircles its entire circumference, giving it a distinct walnut-like shape?

3. What is the estimated total number of icy bodies in the Oort Cloud?

4. What is the average surface temperature of Pluto?

5. What is the name of the moon of Haumea that orbits within its elongated shape?

6. Which moon of Mars is closer to the planet?

7. What is the name of the valley network system on Mars that suggests past water erosion?

8. Which type of tail of a comet is composed of ionized gas and is pushed away from the Sun by the solar wind?

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

10. Which meteorite is composed mainly of iron and nickel and often exhibits a characteristic Widmanstätten pattern upon etching?

11. Which Apollo mission was the last to land humans on the Moon's surface?

12. 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?

13. Which moon of Saturn is known for its complex geological features, including cryovolcanoes, and the famous "tiger stripes" at its south pole?

14. Which moon of Jupiter is thought to have a subsurface ocean beneath its icy crust, potentially harboring conditions suitable for life?

15. Which of the following is NOT a type of plate boundary?

16. Which feature is the largest impact crater on Mercury?

17. What is the main composition of objects found in the Kuiper Belt?

18. What is the name of the phenomenon where a planet or moon passes directly between a star and the observer, causing a temporary decrease in the star's brightness?

19. What is the name of the moon of Neptune with a highly eccentric orbit and retrograde motion?

20. What is the name of the large, high-altitude vortex observed at Venus' south pole?

21. What is the name of the large impact crater on the Moon's surface that contains the Sea of Tranquility, where Apollo 11 landed?

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

23. Which spacecraft was the first to directly measure the solar wind?

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

25. What is the name of the region on Pluto characterized by vast plains of nitrogen ice?

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

27. Which moon of Saturn is the only moon in the Solar System known to have a dense atmosphere, primarily composed of nitrogen?

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

29. What was the last appearance of Halley's Comet before its most recent return in 1986?

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