Solar System Online Test

1. 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?

2. Which space probe conducted flybys of Jupiter and Saturn before embarking on a trajectory to leave the Solar System in a different direction from Voyager 1?

3. What is the approximate diameter of Uranus?

4. What is the name of the process by which rocks are broken down into smaller fragments through physical, chemical, or biological means?

5. What is the primary cause of auroras on Earth?

6. What phenomenon on Venus is characterized by a slow retrograde rotation, meaning it rotates in the opposite direction of most planets in the Solar System?

7. What is the average speed of the solar wind as it leaves the Sun?

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

9. What is the rotational period of Earth?

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

11. 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?

12. What type of rock is formed from the cooling and solidification of magma or lava?

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

14. Which element, essential for life, has been detected in the form of methane on Mars?

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

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

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

18. Which spacecraft conducted a flyby of Pluto and explored the Kuiper Belt object Arrokoth?

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

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

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

22. What is the name of the space telescope launched by NASA in 1990, which has provided breathtaking images and groundbreaking discoveries in astronomy?

23. Which space probe is currently studying the internal structure and seismic activity of Mars, aiming to understand its geological history?

24. Which layer of the Earth's atmosphere is closest to the planet's surface?

25. How many rings does Uranus have?

26. Which asteroid is known for its elongated shape and rapid rotation, resembling a spinning top?

27. How does the temperature on Mercury's surface vary?

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

29. What is gravitational interaction?

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