Space questions This is a list of recently added questions about space. 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: lanusienkaplanets riddles »easy 77% MercuryMercury1564VenusVenus186EarthEarth97MarsMars184 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 Kołodziejczyktourism riddles »very hard 38% Neil Alden ArmstrongNeil Alden Armstrong838Guy LalibertéGuy Laliberté347Dennis TitoDennis Tito1062Richard GarriottRichard Garriott518 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.Solar System riddles »hard 55% 800 times800 times7091,321 times1,321 times221650 times50 times37510,000 times10,000 times695 What are the most luminous objects in the universe?Quasars. A quasar is an extremely energetic source of radiation powered by accretion disc around galaxy's central supermassive black hole. Quasars were much more common in the early universe, as all known quasars are extremely distant.Created by: globalquiz.orglight riddles »hard 40% supergiant starssupergiant stars524novaenovae235supernovaesupernovae2778quasarsquasars2372 How long did it take Apollo 11 flight to reach the Moon? 3 days. It took 1 minute of flight to reach Mach 1 and 12 minutes to enter Earth's orbit. After one and a half orbits, the third-stage engine pushed the spacecraft onto its three-day long travel to the Moon.Created by: Hitter smasherrockets riddles »average 61% 30 minutes30 minutes3083 hours3 hours10683 days3 days415730 days30 days1241 Play astronomy quiz and see all the questions.