Top 10 space facts Selected as the most interesting among space related questions in Space quiz 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 facts » 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.orgtime facts » 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 facts » On planet, except Earth, the greenhouse effect is observed? Venus. If a planet's atmosphere contains radiatively active gases, they will radiate energy in all directions. Part of this radiation is directed towards the surface, warming it. The greenhouse effect on Venus is particularly large because its dense atmosphere consists mainly of carbon dioxide.Created by: Tschuka clouds facts » What astronomical object emerges sometimes from supernova instead of a black hole?Magnetar. A magnetar is a type of neutron star with an extremely powerful magnetic field. The magnetic field decay powers the emission of high-energy electromagnetic radiation, particularly X-rays and gamma rays. As of March 2016, only 23 magnetars are known, with six more candidates awaiting confirmation.Created by: Ninjaistars facts » What is the name of the hypothetical last stage of the evolution of Sun-sized stars?Black dwarf. A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or lightCreated by: Tschuka astronomy facts » What was the name of the first and only Soviet space shuttle?Buran (Snowstorm or Blizzard) was the first spaceplane to be produced as part of the Soviet Buran programme. OK-1K1 completed one unmanned spaceflight in 1988, and was destroyed in 2002 It remains the only Soviet reusable spacecraft to be launched into space. Created by: Tschuka technical facts » Which planet of the Solar System is the coldest?Uranus is the seventh planet from the Sun. It has the coldest planetary atmosphere in the Solar System, with a minimum temperature of 49 K (−224 °C; −371 °F).Created by: Tschuka planets facts » Which two planets are the closest in size?Uranus and Neptune. The diameters of Uranus and Neptune are respectively 25 362 km and 24 622 km - the difference is only 2.92%.Created by: Tschuka planets facts » Who holds the record for the longest single stay in space?Valeri Polyakov. Valeri Vladimirovich Polyakov was a Russian cosmonaut. He stayed aboard the Mir space station for more than 14 months (437 days 18 hours) during a single mission. Created by: Tschuka astronauts facts » Play space quiz and see all the questions.