Solar System Online Test

1. What is the Earth's mantle primarily composed of?

2. Which moon of Uranus is known for its chaotic, fractured surface, possibly due to past impacts or internal heating?

3. What is the name of the largest impact crater on the Moon, located on the lunar near side and visible from Earth?

4. Which space probe was the first to fly by Jupiter and Saturn and provided close-up images of their moons, including Io's volcanic activity?

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

6. How many major rings does Saturn's ring system consist of?

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

8. Which elements in Earth's atmosphere are responsible for the green and red colors in auroras?

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

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

11. What is the term for the process by which sediments are deposited in a new location?

12. Which ground-based telescope is located in Hawaii and is one of the world's premier observatories for optical and infrared astronomy?

13. What is the name of the region beyond the orbit of Neptune where a vast collection of icy bodies, including Pluto, reside?

14. Which ground-based observatory is operated by the European Southern Observatory (ESO) and consists of four individual telescopes located in Chile?

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

16. What geological feature on Earth is formed by the bending or buckling of rock layers under compressional stress, leading to the uplift of mountain ranges?

17. Which moon of Neptune is known for its irregular shape and heavily cratered surface?

18. What is the name of the bright, elongated stream of gas and dust extending from the coma of a comet?

19. What is the approximate length of one day on Venus (one complete rotation)?

20. What is the name of the spacecraft that successfully landed the Huygens probe on Saturn's largest moon, Titan, in 2005?

21. What is the name of a small rocky or metallic body in space that enters Earth's atmosphere and produces a streak of light?

22. Which spacecraft was the first to visit Mercury?

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

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

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

26. Which space probe recently completed its mission by crashing into the surface of Comet 67P/Churyumov-Gerasimenko?

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

28. Which Mars rover recently completed its mission, having operated on the Martian surface for over 15 years?

29. What is the term for a meteoroid that originates from a comet or asteroid and travels through space?

30. Which Mars rover was launched in 2011 and has been exploring Gale Crater since its landing in 2012?