Solar System Online Test

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

2. What is the primary component of Venus's atmosphere?

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

4. 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?

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

6. Which phenomenon is caused by tidal forces and results in the slowing of a celestial body's rotation?

7. Which moon of Neptune is known for its retrograde orbit, meaning it orbits the planet in the opposite direction of Neptune's rotation?

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

9. What is the most prominent feature of Neptune's atmosphere?

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

11. Which moon of Saturn is known for its thick atmosphere and lakes of liquid methane and ethane on its surface?

12. Which moon of Jupiter is the most heavily cratered body in the Solar System, indicating its ancient surface?

13. What is the phenomenon called when the solar wind compresses Earth's magnetosphere on the side facing the Sun?

14. What term refers to the bright streak of light produced when a meteoroid burns up in Earth's atmosphere?

15. What is the layer of soil that contains organic matter, microorganisms, and plant roots, and is vital for supporting plant growth?

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

17. What is the name of the hexagonal cloud pattern observed at Saturn's north pole?

18. Which planet in the Solar System experiences the strongest winds, with wind speeds reaching up to 1,800 kilometers per hour (about 1,118 miles per hour)?

19. 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?

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

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

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

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

24. How does the solar wind affect Earth's magnetosphere?

25. What is the name of the largest moon in the Solar System, which orbits the gas giant Jupiter and is larger than the planet Mercury?

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

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

28. How do solar storms, like coronal mass ejections, affect the occurrence of auroras?

29. Which moon of Jupiter is known for its smooth, icy surface with long cracks and streaks caused by tidal forces?

30. Which asteroid is known for its large impact crater named Rheasilvia Basin?