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Solar System Expert Trivia Challenge

Take “Solar System Expert Trivia Challenge,” a focused 20-question trivia challenge with clear outcomes created specifically for this article.

20 questionsChallenging10–12 min

Science20 questions · one page

QuizMora Editorial TeamPublished August 11, 2026 · Updated August 11, 2026

Work through 20 mobile-friendly questions created only for Solar System Expert Trivia Challenge. Submit once to see the complete outcome without answers or result clues being revealed early.

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20 QuestionsScience Quiz

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Question 1 of 20ScienceMercury completes how many rotations for every two orbits?

ATwo BThree CFour DOne

Question 2 of 20ScienceWhich planet has the longest year?

AUranus BSaturn CJupiter DNeptune

Question 3 of 20ScienceWhat term describes Venus's backward spin compared with most planets?

ARetrograde rotation BTidal locking COrbital resonance DAxial precession

Question 4 of 20ScienceWhat is the vast canyon system on Mars called?

AHellas Planitia BOlympus Mons CValles Marineris DArabia Terra

Question 5 of 20ScienceWhich moon is the most volcanically active body known?

AIo BCallisto CTitan DGanymede

Question 6 of 20ScienceWhat type of feature is Jupiter's Great Red Spot?

AImpact crater BIce cap CStorm DVolcano

Question 7 of 20ScienceWhich Saturnian moon has a huge equatorial ridge and two-tone surface?

ADione BRhea CMimas DIapetus

Question 8 of 20ScienceWhat is the boundary around the Sun's influence called?

ATropopause BHeliopause CMagnetopause DExosphere

Question 9 of 20ScienceWhich trans-Neptunian object has a large moon named Vanth?

AOrcus BGonggong CSedna DQuaoar

Question 10 of 20ScienceWhat was Neptune's large storm photographed by Voyager 2 called?

AGreat Red Spot BGreat Dark Spot CWhite Oval DDragon Storm

Question 11 of 20ScienceWhich comet returns to the inner Solar System about every 76 years?

AHale-Bopp BHyakutake CHalley's Comet DShoemaker-Levy 9

Question 12 of 20ScienceWhich asteroid was the first target orbited by NASA's Dawn spacecraft?

ABennu BEros CVesta DItokawa

Question 13 of 20ScienceWhat type of planet is Jupiter?

ATerrestrial planet BIce dwarf CGas giant DDwarf planet

Question 14 of 20ScienceWhich planet has a day longer than its year?

AMercury BNeptune CMars DVenus

Question 15 of 20ScienceWhich points let spacecraft balance the gravity of two large bodies?

AVan Allen belts BLagrange points CTrojan gaps DRoche limits

Question 16 of 20ScienceWhich planet is closest in size to Earth?

ANeptune BMars CMercury DVenus

Question 17 of 20ScienceWhich moon has a retrograde orbit and geysers of nitrogen?

ATriton BCallisto CTitan DIo

Question 18 of 20ScienceWhich trans-Neptunian object has a moon named Weywot?

ASedna BGonggong COrcus DQuaoar

Question 19 of 20ScienceWhat powers the Sun?

ANuclear fusion BRadioactive decay CChemical burning DNuclear fission

Question 20 of 20ScienceWhich spacecraft first visited Pluto?

AVoyager 1 BNew Horizons CCassini DJuno

Complete all 20 questions to unlock your result.

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