Solar System questions This is a list of recently added questions about Solar System. Play Solar System quiz and see all the questions. 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. Created by: smyruhard 46% low temperatureslow temperatures1171lack of oxygenlack of oxygen3281poor gravitypoor gravity923cosmic rayscosmic rays4758planets 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.Created by: lanusienkaeasy 77% MercuryMercury2523VenusVenus303EarthEarth144MarsMars274space 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 activityCreated by: ippili_chvery hard 39% Titan Titan 433GanymedeGanymede605lolo951EuropaEuropa400astronomy riddles » 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.Created by: Paweł Kołodziejczykvery hard 39% Neil Alden ArmstrongNeil Alden Armstrong1124Guy LalibertéGuy Laliberté453Dennis TitoDennis Tito1454Richard GarriottRichard Garriott674tourism 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.Created by: K.R.A.C.hard 56% 800 times800 times9031,321 times1,321 times285050 times50 times45610,000 times10,000 times850astronomy 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).Created by: Paweł Kołodziejczykeasy 72% sevenseven604eighteight4162ninenine835173173109astronomy riddles » How many planets in the Solar System are not named after a Greek or Roman god?One. It's the Earth.Created by: globalquiz.orgaverage 61% nonenone1299oneone4856twotwo1031threethree730names riddles » Which planets in the Solar System have no natural satellites?Mercury and Venus. Only Mercury and Venus have no natural satellites.Created by: globalquiz.orghard 55% Mercury onlyMercury only1819Mercury and VenusMercury and Venus5212Mercusy and MarsMercusy and Mars1037there are no such planetsthere are no such planets1262astronomy riddles » Olympus Mons is the largest known volcano. Where is it?On Mars. Olympus Mons (Latin for Mount Olympus) is a large shield volcano on the planet Mars, having a height of nearly 22 km (14 mi). Being a shield volcano, it has a very low profile. The average slope on the volcano's flanks is only 5°. Because of that, an observer standing on the Martian surface would be unable to view the entire profile of the volcano, even from a great distance.Created by: Trương Ngọc Hùngaverage 62% in Australiain Australia610in Indonesiain Indonesia1439in Antarcticain Antarctica2014on Marson Mars6867volcanoes 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.Created by: Cleohard 47% Shakespeare's charactersShakespeare's characters5255Roman godsRoman gods2713German and Arthurian legendsGerman and Arthurian legends1928Roman emperors and their wivesRoman emperors and their wives1063theater riddles » Play Solar System quiz and see all the questions.