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 47% low temperatureslow temperatures1207lack of oxygenlack of oxygen3395poor gravitypoor gravity976cosmic rayscosmic rays5083planets 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% MercuryMercury2903VenusVenus348EarthEarth163MarsMars312space 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_chhard 40% Titan Titan 487GanymedeGanymede685lolo1114EuropaEuropa443astronomy 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 Kołodziejczykhard 40% Neil Alden ArmstrongNeil Alden Armstrong1204Guy LalibertéGuy Laliberté493Dennis TitoDennis Tito1636Richard GarriottRichard Garriott724tourism 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 times9731,321 times1,321 times310350 times50 times48610,000 times10,000 times903astronomy 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 73% sevenseven653eighteight4563ninenine897173173121astronomy 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% nonenone1370oneone5212twotwo1098threethree774names 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 56% Mercury onlyMercury only1891Mercury and VenusMercury and Venus5707Mercusy and MarsMercusy and Mars1098there are no such planetsthere are no such planets1322astronomy 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 63% in Australiain Australia632in Indonesiain Indonesia1493in Antarcticain Antarctica2113on Marson Mars7297volcanoes 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 48% Shakespeare's charactersShakespeare's characters5526Roman godsRoman gods2817German and Arthurian legendsGerman and Arthurian legends1989Roman emperors and their wivesRoman emperors and their wives1101theater riddles » Play Solar System quiz and see all the questions.