Solar System quiz

More questions about Solar System

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Why do footprints on the Moon last far longer than footprints on Earth?

   Answer: No wind or rain

   Why: Lunar Reconnaissance Orbiter data show tiny impacts churn the top two centimetres of Moon dust roughly every 81,000 years.

2. 2 Medium

   What kind of weather phenomenon is Jupiter's Great Red Spot?

   Answer: Anticyclonic storm

   Why: A 2024 study concluded the current spot dates from about 1831 and is not the Permanent Spot that Cassini tracked in 1665.

3. 3 Hard

   At which Lagrange points do Trojan asteroids cluster along Jupiter's orbit?

   Answer: L4 and L5

   Why: These points sit 60 degrees ahead of and behind Jupiter, providing stable gravitational pockets for thousands of asteroids.

4. 4 Easy

   What chemical gives the surface of Mars its reddish appearance?

   Answer: Iron oxide

   Why: A 2025 study identified the dust as ferrihydrite, a hydrated rust that forms in cool water, so Mars likely reddened while it was still wet.

5. 5 Medium

   Which moon ejects plumes of water ice into space?

   Answer: Enceladus

   Why: Webb traced this plume more than 9,600 km into space, about 19 times the moon's own width, feeding a ring of water around Saturn.

6. 6 Hard

   Which planet was the first to be discovered using mathematical predictions?

   Answer: Neptune

   Why: Galle spotted Neptune on 23 September 1846 after under an hour of searching, less than a degree from Le Verrier's predicted point.