Solar System Online Test

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

2. What is the name of the largest moon of Jupiter?

3. What is the name of the tallest mountain on Mars, often compared to Mount Everest on Earth?

4. What are substorms in the context of Earth's magnetosphere?

5. Which moon of Jupiter is known for its highly active surface geology, with extensive cryovolcanism and icy geysers?

6. What is the name of the storm system observed at Saturn's south pole, which is similar to Jupiter's Great Red Spot but located at the pole?

7. Which moon of Saturn is known for its active geysers erupting from its south pole, indicating the presence of a subsurface ocean?

8. Which space probe carried a golden record containing sounds and images of Earth, intended as a message to potential extraterrestrial civilizations?

9. Which spacecraft was the first to visit Mercury?

10. Which spacecraft provided the first close-up images and data of Neptune and its moons?

11. Which gas giant planet has the fastest winds in the Solar System, with wind speeds reaching up to 2,100 kilometers per hour (about 1,305 miles per hour)?

12. 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?

13. Which comet is often referred to as "the Great Comet of 1910" due to its spectacular appearance and close approach to Earth?

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

15. Which dwarf planet is considered the largest object in the Kuiper Belt?

16. Which space probe was the first to visit Jupiter and later became the first human-made object to leave the Solar System?

17. What is the name of the largest impact basin on Mars, covering a vast region of the planet's southern hemisphere?

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

19. What is axial tilt in planetary astronomy?

20. What geological feature on Mercury suggests it has contracted over time?

21. Which moon of Jupiter is the largest in the solar system?

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

23. What is the lithosphere?

24. Which comet is famous for its spectacular breakup into multiple fragments, which collided with Jupiter in 1994?

25. Which canyon system on Mars is the largest in the solar system?

26. Which mission provided the first detailed radar maps of Venus's surface?

27. What is the name of the moon of Makemake discovered in 2015?

28. What is the name of the largest and brightest ring of Uranus?

29. Which comet is the most famous and well-known, with a regular period of approximately 76 years?

30. What is the rotational period of Earth?