Planets questions This is a list of recently added questions about planets. Play planets quiz and see all the questions. Which planet is this globe with such a bland look without any details?Uranus. Upper parts of Uranus' atmosphere are composed of condensed hydrocarbons, mainly methane crystal particles. Contrary to the rest of gas giant planets, it's hard to observe clouds and storm bounds.Created by: smyruhard 58% UranusUranus5270NeptuneNeptune2509MercuryMercury501VenusVenus675Solar 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. Created by: smyruhard 48% low temperatureslow temperatures1233lack of oxygenlack of oxygen3484poor gravitypoor gravity1015cosmic rayscosmic rays5370astronautics 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 78% MercuryMercury3181VenusVenus376EarthEarth175MarsMars341space 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 57% 800 times800 times10291,321 times1,321 times330450 times50 times51610,000 times10,000 times941astronomy 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% sevenseven686eighteight4789ninenine931173173127astronomy 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% nonenone1419oneone5457twotwo1140threethree810names 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 57% Mercury onlyMercury only1973Mercury and VenusMercury and Venus6137Mercusy and MarsMercusy and Mars1135there are no such planetsthere are no such planets1362astronomy 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.Created by: globalquiz.orgaverage 68% MercuryMercury1471VenusVenus10800MarsMars1611JupiterJupiter1860technology 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.Created by: globalquiz.orghard 42% volcanic peaksvolcanic peaks471atmospheric stormsatmospheric storms2670Jupiter moonsJupiter moons4923multiple magnetic poles of Jupitermultiple magnetic poles of Jupiter3396physics 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.Created by: Kasiahard 55% MercuryMercury1027VenusVenus6693MarsMars3732UranusUranus628technology riddles » Play Solar System quiz and see all the questions.