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% UranusUranus8293NeptuneNeptune3566MercuryMercury619VenusVenus874Solar 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 temperatures1669lack of oxygenlack of oxygen4880poor gravitypoor gravity1314cosmic rayscosmic rays8885astronautics 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 81% MercuryMercury7444VenusVenus717EarthEarth279MarsMars639space 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 times20111,321 times1,321 times619450 times50 times92710,000 times10,000 times1618astronomy 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% sevenseven1317eighteight8351ninenine1366173173178astronomy 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% nonenone2387oneone11044twotwo1932threethree1308mythology 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 only3574Mercury and VenusMercury and Venus10344Mercusy and MarsMercusy and Mars1898there are no such planetsthere are no such planets2329astronomy 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% MercuryMercury2034VenusVenus14897MarsMars2426JupiterJupiter2657technology 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 peaks616atmospheric stormsatmospheric storms3978Jupiter moonsJupiter moons6988multiple magnetic poles of Jupitermultiple magnetic poles of Jupiter5012physics 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 56% MercuryMercury1232VenusVenus9267MarsMars5066UranusUranus749technology riddles » Play Solar System quiz and see all the questions.