🇫🇷 Version française · 🇪🇸 Español
🎃 Halloween special: play the Halloween quiz →
🎄 Christmas special: play the Christmas quiz →
🎆 New Year special: play the New Year quiz →
Free Space quiz: 92 trivia questions and answers — planets, stars & space exploration. Easy to hard, with explained answers. No sign-up.
Start this quiz →🖨️ Printable version (20 questions + answers)
From black holes to the planets of the solar system, by way of the space race, this quiz explores the mysteries and achievements of humanity's exploration of the universe. A fun way to test your astronomy knowledge.
This quiz currently has 92 questions, ranging from easy to hard, available in French, English and Spanish when the Spanish translation is available.
Warm up before the quiz with these 18 trivia questions and their explained answers: click a question to reveal the answer.
Answer: Mercury. Mercury orbits at an average distance of about 58 million km from the Sun.
Answer: 300,000 km/s. Light travels at approximately 299,792 km per second in a vacuum.
Answer: Hydrogen and helium. The Sun is composed of about 74% hydrogen and 24% helium.
Answer: A distance. A light-year is the distance light travels in one year, about 9.46 trillion km.
Answer: SpaceX. SpaceX's Crew Dragon capsule carried NASA astronauts to the ISS in May 2020, a first for a private company.
Answer: Sun. The Sun is the central star of our solar system.
Answer: Kourou, French Guiana. Its position close to the equator gives rockets a 'boost' from the Earth's rotation: they save fuel and can carry heavier payloads.
Answer: Galileo. Io, Europa, Ganymede and Callisto are called the 'Galilean moons'. Their discovery showed that not everything revolved around the Earth.
Answer: About 8 minutes. About 8 minutes and 20 seconds to cover 150 million km. So the Sun we see (never with the naked eye!) is the Sun as it was 8 minutes ago.
Answer: Proxima Centauri. Proxima Centauri is located about 4.2 light-years from our solar system.
Answer: Sputnik 1. The USSR launched Sputnik 1 on October 4, 1957, marking the beginning of the space age.
Answer: 15 million degrees Celsius. The Sun's core reaches about 15 million degrees Celsius, compared to 5,500°C at its surface.
Answer: Jupiter. Jupiter completes a full rotation in under 10 hours, the fastest in the solar system.
Answer: Titan. It is about -180 °C there: water is as hard as rock, and methane plays the role of water, with clouds, rain and seas. NASA plans to send a drone there, Dragonfly.
Answer: Hayabusa. Despite multiple breakdowns, it brought back tiny grains from the asteroid Itokawa after a seven-year journey. Its 'little sister' Hayabusa2 did it again in 2020 with the asteroid Ryugu.
Answer: Hot metal or seared meat. The smell is thought to come from chemical reactions between atomic oxygen in orbit and surfaces. NASA even commissioned a scent mimicking the 'smell of space' to train its astronauts.
Answer: China. The Chang'e 4 mission delivered the Yutu-2 rover there. Since the far side never faces Earth, a relay satellite was needed to communicate.
Answer: Perihelion. Surprise: Earth is closest to the Sun in the middle of the northern winter! Seasons come from the tilt of its axis, not from distance.
74 more questions are waiting for you in the quiz!