Astronomy questions This is a list of recently added questions about astronomy. Play astronomy quiz and see all the questions. 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: lanusienkaspace riddles »easy 77% MercuryMercury1558VenusVenus184EarthEarth97MarsMars184 Which era of the universe are we currently living in ?The stelliferous era. There are five eras of the universe which are the primordial era,the stelliferous era, the degenerate era, the black hole era and the dark eraCreated by: Palash Chakraborty<10 answersThe stelliferous eraThe stelliferous era3The degenerate eraThe degenerate era0The primordial eraThe primordial era1The black hole eraThe black hole era1 The closest star to Sun is Proxima Centauri. In which direction we would need to look to see it on the night sky?It is not visible at all. Proxima Centauri is a red dwarf and its average brightness is very low. That is why even though it is closest to Sun, it was discovered not until in 1915.Created by: Inesstars riddles »hard 48% Great BearGreat Bear894SiriusSirius1028CassiopeiaCassiopeia633it is not visible at allit is not visible at all2384 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_chSolar System riddles »very hard 38% Titan Titan 325GanymedeGanymede425lolo648EuropaEuropa279 What is the name of the galaxies group to which Milky Way belong?Virgo Supercluster. The Virgo Supercluster or the Local Supercluster contains at least 100 galaxy groups including the Local Group, which in turn contains the Milky Way and Andromeda Galaxies. Yet, it is one of millions of superclusters in the observable universe.Created by: Krzysztof Moskalhard 45% Supercluster in LibraSupercluster in Libra364Virgo SuperclusterVirgo Supercluster1181Gemini SuperclusterGemini Supercluster614Ophiuchus AuperclusterOphiuchus Aupercluster425 Imagine that a distant civilization watches the Earth from 100 million light years away. What can they see right now?Dinosaurs. If a distant civilization watches the Earth right now, it sees its image from the past.Created by: Krzysztof Moskalphysics riddles »hard 53% skyscrapersskyscrapers207the future the future 687dinosaursdinosaurs2848early Earth with no life yetearly Earth with no life yet1577 When was the first rocket launched into space in the history of mankind?October 3, 1942. The first rocket that reached space was the German V2 rocket during a test flight Oct. 3, 1942.Created by: Krzysztof Moskalrockets riddles »very hard 39% April 12, 1961April 12, 1961560October 3, 1942October 3, 1942969October 11, 1937October 11, 1937241October 4, 1957October 4, 1957663 Who was the first man to leave the spacecraft in space?Alexey Arkhipovich Leonov was a Soviet astronaut, general major pilot and two-time Hero of the Soviet Union. On 18 March 1965, he became the first human to conduct extra-vehicular activity, exiting the capsule during the Voskhod 2 mission for a 12-minute spacewalk.Created by: Paweł KołodziejczykSoviet Union riddles »hard 40% Neil Alden ArmstrongNeil Alden Armstrong719Edwin Eugene Buzz Aldrin, Jr.Edwin Eugene Buzz Aldrin, Jr.288Alexey Arkhipovich LeonovAlexey Arkhipovich Leonov1416Yuri Alekseyevich GagarinYuri Alekseyevich Gagarin1044 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 Tito1057Richard GarriottRichard Garriott517 Which stars live the longest in the universe?Little stars. Large and super-massive stars rapidly burn out. The lifetime of the blue supergiant is only a few tens of millions of years. Meanwhile, the small red dwarfs emit small amounts of energy and burn out very slowly - it is estimated that they may shine through the hundreds of billions of years.Created by: Krzysztof Moskalstars riddles »hard 53% supermassive starssupermassive stars479big starbig star168little starslittle stars1816the mass of the star has no effect on its lifetimethe mass of the star has no effect on its lifetime917 Play astronomy quiz and see all the questions.