Home» Online Test » Astronomy » Solar System Online Test 0% Sorry, time's up. To complete the online test, please restart it. Created by Vikash chaudhary This 'Solar System Online Test' covers questions across all the topics related to our Solar System. Get fresh, new questions in each attempt. Total Questions: 30 Time Allotted: 30 minutes Passing Score: 50% Randomization: Yes Certificate: Yes Do not refresh the page! 👍 All the best! 1 / 30 1. What characteristic makes Mercury unique among the terrestrial planets? a) Its large number of moons b) Its extremely tilted axis c) Its large iron core relative to its size d) Its thick atmosphere 2 / 30 2. What is the name of the moon of Pluto discovered in 2005 and named after the ferryman of the underworld in Greek mythology? a) Charon b) Styx c) Nix d) Kerberos 3 / 30 3. What is unique about Uranus's rotation axis compared to other planets in the Solar System? a) It has a retrograde rotation b) It has an extremely slow rotation c) It has a nearly 90-degree tilt d) It has no rotation axis tilt 4 / 30 4. Which moon of Jupiter is thought to have a subsurface ocean beneath its icy crust, similar to Europa, but with a greater depth and complexity? a) Io b) Europa c) Ganymede d) Callisto 5 / 30 5. Which spacecraft was the first to visit Mercury? a) Voyager 1 b) Pioneer 10 c) Mariner 10 d) Galileo 6 / 30 6. Which dwarf planet was the first to be discovered beyond Pluto's orbit in the Kuiper Belt? a) Eris b) Haumea c) Makemake d) Ceres 7 / 30 7. What is the name of the intense radiation belt surrounding Jupiter? a) Van Allen Belts b) Kuiper Belt c) Oort Cloud d) Magnetosphere 8 / 30 8. Which space probe conducted a flyby of Pluto in 2015, providing the first close-up images of the dwarf planet? a) New Horizons b) Juno c) Curiosity d) Opportunity 9 / 30 9. What is the name of Kepler's second law of planetary motion? a) Law of Inertia b) Law of Conservation of Angular Momentum c) Law of Equal Areas d) Law of Gravitation 10 / 30 10. What is the largest gap in Saturn's rings, located between the A ring and the B ring? a) Encke Gap b) Cassini Division c) Keeler Gap d) Roche Division 11 / 30 11. Which dwarf planet is notable for its elongated shape and rapid rotation? a) Eris b) Haumea c) Makemake d) Ceres 12 / 30 12. 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? a) Tidal heating b) Tidal friction c) Tidal stretching d) Tidal locking 13 / 30 13. What is the name of the largest volcano in the solar system, located on Mars? a) Mount Everest b) Olympus Mons c) Mount Kilimanjaro d) Mauna Kea 14 / 30 14. Which moon of Jupiter is the largest moon in the Solar System, even larger than the planet Mercury? a) Io b) Europa c) Ganymede d) Callisto 15 / 30 15. Which spacecraft conducted the first soft landing on the far side of the Moon in 2019, deploying the Yutu-2 rover? a) Apollo 11 b) Chang'e 4 c) Chandrayaan-2 d) Luna 2 16 / 30 16. Which space probe was the first to visit the asteroid belt and to make direct observations of Jupiter? a) Voyager 1 b) Voyager 2 c) Pioneer 10 d) Pioneer 11 17 / 30 17. What is the name of the spacecraft that discovered geysers erupting from beneath the icy surface of Saturn's moon, Enceladus? a) Cassini b) New Horizons c) Juno d) Voyager 2 18 / 30 18. Which space telescope is set to succeed the Hubble Space Telescope and is designed to observe the universe in the infrared spectrum? a) Hubble Space Telescope b) James Webb Space Telescope c) Keck Observatory d) Chandra X-ray Observatory 19 / 30 19. What is the primary component of Neptune's atmosphere? a) Nitrogen b) Hydrogen c) Methane d) Helium 20 / 30 20. What is the name of the spacecraft that orbited Saturn and its moons, providing detailed observations and data? a) Galileo b) Voyager c) Cassini d) Juno 21 / 30 21. How do solar storms, like coronal mass ejections, affect the occurrence of auroras? a) They reduce the frequency of auroras b) They cause auroras to occur only at the poles c) They enhance and expand the visibility of auroras d) They eliminate auroras completely 22 / 30 22. What is the Kuiper Belt? a) A region of space between Mars and Jupiter b) A ring of debris surrounding Saturn c) A region of the outer Solar System beyond Neptune d) A cluster of asteroids near Earth 23 / 30 23. Which space probe is currently studying the polar regions and atmosphere of Mars, searching for signs of past or present life? a) New Horizons b) Juno c) Curiosity d) Perseverance 24 / 30 24. Which type of comets are believed to originate from the Oort Cloud? a) Short-period comets b) Long-period comets c) Jupiter-family comets d) Halley-type comets 25 / 30 25. Which comet is known for its exceptionally long tail and was visible to the naked eye for several months in 1997? a) Halley's Comet b) Comet Hale-Bopp c) Comet Shoemaker-Levy 9 d) Comet Hyakutake 26 / 30 26. Which space probe conducted the first flyby of Saturn and provided detailed images of its rings and moons? a) Voyager 1 b) Voyager 2 c) Pioneer 10 d) Pioneer 11 27 / 30 27. What is the name of the moon of Pluto discovered in 2011 and named after the three-headed dog that guards the entrance to the underworld in Greek mythology? a) Charon b) Styx c) Nix d) Kerberos 28 / 30 28. Which instrument on spacecraft is used to measure the impact of the solar wind on Earth's magnetosphere? a) Magnetometer b) Spectrometer c) Seismometer d) Barometer 29 / 30 29. Which moon of Saturn is known for its thick atmosphere and lakes of liquid methane and ethane on its surface? a) Titan b) Enceladus c) Mimas d) Rhea 30 / 30 30. Which moon of Jupiter is known for its bright, highly reflective surface and its distinctive grooved terrain? a) Io b) Europa c) Ganymede d) Callisto Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score isShare your achievement! LinkedIn Facebook 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. Send feedback Buy Solar System MCQ PDF for Offline Study