10 most difficult Solar System riddles A list of ten (out of 18) Solar System related questions that are the most often answered incorrectly Solar System quiz What is the name of first in history cosmic tourist (astrotourist)?Dennis Tito. Dennis Anthony Tito is an American engineer and multimillionaire, most widely known as the first space tourist to fund his own trip into space. Tito paid a reported $20 million to the Russian Federal Space Agency.very hard 39% Neil Alden ArmstrongNeil Alden Armstrong30%Guy LalibertéGuy Laliberté12%Dennis TitoDennis Tito39%Richard GarriottRichard Garriott18%Created by: Paweł Kołodziejczyk. Statistics based on 3705 answers in 2 languages »space riddles » Which is the only moon with active volcanoes?Lo is a very tiny moon that is enormously influenced by the gravity of Jupiter. The great forces of Jupiter and its other moons exert such long pulls on lo that it deforms continuously from strong internal friction. These tides produce tremendous amount of internal friction, which heats the moon and enables its volcanic activityvery hard 39% Titan Titan 18%GanymedeGanymede25%lolo39%EuropaEuropa16%Created by: ippili_ch. Statistics based on 2389 answers in 2 languages »astronomy riddles » 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 10595 answers in 2 languages »planets riddles » The Moon takes just as long to rotate around its own axis as it does to revolve around the planet (Earth). How many other moons in the Solar System share this feature?Most of them. If the rotational frequency of satellite is larger than orbital frequency, a small torque counteracting the rotation arises, eventually locking the frequencies in a tidal lock. Pluto and Charon are the extreme example, being locked to each other.hard 44% nonenone30%oneone15%threethree9%most of themmost of them44%Created by: globalquiz.org. Statistics based on 10895 answers in 4 languages »Moon 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 10133 answers in 2 languages »astronautics riddles » What kind of 'natural disasters' happen on the moon?Moonquakes are produced by tidal forces. Moonquakres are much less common and weaker than earthquakes, although they can last for up to an hour - a significantly longer time than terrestrial earthquakes - because of the absence of water to damp out the seismic vibrations.hard 47% volcanic eruptionsvolcanic eruptions15%moonquakesmoonquakes47%floodsfloods2%dust stormsdust storms34%Created by: life-o-holic. Statistics based on 10718 answers in 2 languages »astronomy riddles » Where do the names of Uranus moons (Ariel, Umbriel, Miranda, Titania, Oberon) come from?Shakespeare's characters. William Herschel, Englishman, discoverer of Uranus and its major moons, was very patriotic for naming. He originally named Uranus as "George Star" to honour king of England, but the name was changed later.hard 47% Shakespeare's charactersShakespeare's characters47%Roman godsRoman gods24%German and Arthurian legendsGerman and Arthurian legends17%Roman emperors and their wivesRoman emperors and their wives9%Created by: Cleo. Statistics based on 10958 answers in 2 languages »theater 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 11396 answers in 2 languages »technology 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 9330 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 5059 answers in 2 languages »astronomy riddles » Play Solar System quiz and see all the questions.