The most difficult planets riddles A list of planets related questions that are most often answered incorrectly Solar System quiz This is the aurora of Jupiter. What are the visible bright spots caused by?Jupiter moons. Jupiter's moons, especially Io (spot on the left), are powerful sources of auroras on Jupiter. These arise from electric currents along field lines, generated by a dynamo mechanism due to the relative motion between the rotating planet and the moving moon.hard 42% volcanic peaksvolcanic peaks4%atmospheric stormsatmospheric storms23%Jupiter moonsJupiter moons42%multiple magnetic poles of Jupitermultiple magnetic poles of Jupiter29%Created by: globalquiz.org. Statistics based on 10579 answers in 2 languages »Solar System riddles » Mars colonisation is a hype topic. What is the biggest threat for those wishing to take a part in a journey to Mars?Cosmic rays. The only efficient protection against high energetic cosmic radiation, one we are granted with, is Earth magnetic field. Both during a long flight to Mars and through the stay on the planet, that did not form electromagnetic field, astronauts would be exposed to ionization. hard 46% low temperatureslow temperatures11%lack of oxygenlack of oxygen32%poor gravitypoor gravity9%cosmic rayscosmic rays46%Created by: smyru. Statistics based on 10114 answers in 2 languages »astronautics riddles » Which planet is the closest in size to Earth?Venus. The equatorial diameter of Venus is about 95% the size of the Earth's equatorial diameter. Moreover, its mass, density and orbit is also closest to those of Earth.hard 54% MercuryMercury8%VenusVenus54%MarsMars31%UranusUranus5%Created by: Kasia. Statistics based on 11383 answers in 2 languages »astronomy riddles » Which planets in the Solar System have no natural satellites?Mercury and Venus. Only Mercury and Venus have no natural satellites.hard 55% Mercury onlyMercury only19%Mercury and VenusMercury and Venus55%Mercusy and MarsMercusy and Mars11%there are no such planetsthere are no such planets13%Created by: globalquiz.org. Statistics based on 9304 answers in 2 languages »astronomy riddles » How many times is Jupiter's volume larger than Earth's volume?1,321 times. Jupiter is so big, that it is almost the size of a star. The smallest known red dwarf is just 16 percent larger in diameter than Jupiter.hard 56% 800 times800 times17%1,321 times1,321 times56%50 times50 times9%10,000 times10,000 times16%Created by: K.R.A.C.. Statistics based on 5042 answers in 2 languages »space riddles » How many planets in the Solar System are not named after a Greek or Roman god?One. It's the Earth.average 61% nonenone16%oneone61%twotwo13%threethree9%Created by: globalquiz.org. Statistics based on 7892 answers in 2 languages »names riddles » Which planet is the brightest seen from Earth?Venus is much brighter than other planets. It is due to its proximity to the Sun (source of light), and bright clouds of sulfuric acid in its atmosphere.average 68% MercuryMercury9%VenusVenus68%MarsMars10%JupiterJupiter11%Created by: globalquiz.org. Statistics based on 14296 answers in 4 languages »technology riddles » How many planets does the Solar System consist of?Eight. These are Mercury, the Venus, the Earth, Mars, the Jupiter, the Saturn, the Uranus and the Neptune. The Pluto is excluded from the list since 2006, and it is classified as one of dwarf planets (not even the largest of them).easy 72% sevenseven10%eighteight72%ninenine14%1731731%Created by: Paweł Kołodziejczyk. Statistics based on 5685 answers in 4 languages »astronomy riddles » Which planet of the solar system has the smallest surface?Mercury has a surface of 75x10^6 km^2, which is equal to 14,7% of Earth' surface.easy 77% MercuryMercury77%VenusVenus9%EarthEarth4%MarsMars8%Created by: lanusienka. Statistics based on 3226 answers in 2 languages »astronomy riddles » Play Solar System quiz and see all the questions.