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: smyruaverage 62% UranusUranus8733NeptuneNeptune3691MercuryMercury640VenusVenus913Solar 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 53% low temperatureslow temperatures1756lack of oxygenlack of oxygen5077poor gravitypoor gravity1395cosmic rayscosmic rays9445astronautics 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: lanusienkavery easy 82% MercuryMercury8076VenusVenus772EarthEarth291MarsMars682space 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 times21221,321 times1,321 times662650 times50 times99210,000 times10,000 times1710astronomy 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 74% sevenseven1390eighteight8976ninenine1445173173192astronomy 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 66% nonenone2502oneone11609twotwo2028threethree1375mythology 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 only3761Mercury and VenusMercury and Venus11104Mercusy and MarsMercusy and Mars1970there are no such planetsthere are no such planets2421astronomy 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 67% MercuryMercury2126VenusVenus15711MarsMars2519JupiterJupiter2773technology 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 peaks646atmospheric stormsatmospheric storms4130Jupiter moonsJupiter moons7349multiple magnetic poles of Jupitermultiple magnetic poles of Jupiter5194physics 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 57% MercuryMercury1261VenusVenus9661MarsMars5192UranusUranus770technology riddles » Play Solar System quiz and see all the questions.