Space Trivia Questions and Answers

25 questions on Space, each with the answer and a short explanation. Part of the Science set in Rapid Fire Trivia, which holds 2,000 questions across 5 topics.

All 25 questions, with answers

1. 1About how long is one solar day on Mars?

   AnswerAbout 24 hours 39 minutes

   A Martian sol is only about forty minutes longer than an average day on Earth.

2. 2What planet has a day commonly divided into about 24 hours?

   AnswerEarth

   Earth’s solar day is about 24 hours, set by its rotation relative to the Sun.

3. 3Which object lies at the center of our Solar System?

   AnswerThe Sun

   The Sun contains nearly all the Solar System’s mass and anchors planetary orbits.

4. 4Who was the first person to walk on the Moon?

   AnswerNeil Armstrong

   Armstrong stepped onto the lunar surface during Apollo 11 in July 1969.

5. 5Why can the Moon be visible during daylight?

   AnswerIt can reflect sunlight while above the horizon

   The Moon is often bright enough to see against the daytime sky when its position is favorable.

6. 6The Solar System’s largest planet is which one?

   AnswerJupiter

   Jupiter contains more mass than all the other Solar System planets combined.

7. 7A group of stars forming a recognized pattern in the sky is called what?

   AnswerConstellation

   Cultures have long used constellations to organize the sky, navigate, and mark seasonal changes.

8. 8What planet has no natural moons, like Mercury?

   AnswerVenus

   Venus and Mercury are the only recognized planets without permanent natural satellites.

9. 9The Great Red Spot belongs to which planet?

   AnswerJupiter

   The Great Red Spot is a long-lived storm larger than Earth in Jupiter’s atmosphere.

10. 10What Saturnian moon is famous for one very dark hemisphere and one much brighter hemisphere?

    AnswerIapetus

    Dark material coating the leading side creates one of the Solar System’s strongest hemispheric color contrasts.

11. 11Which multinational space station began continuous human occupation in 2000?

    AnswerInternational Space Station

    The International Space Station has hosted rotating international crews continuously since November 2000.

12. 12What Moon phase follows the new Moon as the illuminated portion begins increasing?

    AnswerWaxing crescent

    A waxing crescent appears shortly after new Moon, with the visible lit fraction growing each evening.

13. 13Which of Mars’s two moons is larger?

    AnswerPhobos

    Phobos is larger and orbits much closer to Mars than the smaller moon Deimos.

14. 14Which planet contains the giant volcano Olympus Mons?

    AnswerMars

    Olympus Mons is a vast shield volcano rising far above the surrounding Martian plains.

15. 15What star completes the Summer Triangle with Vega and Altair?

    AnswerDeneb

    Deneb in Cygnus forms the Summer Triangle’s third corner and is an extremely luminous supergiant.

16. 16Which constellation is easily recognized by a W-shaped pattern?

    AnswerCassiopeia

    Five bright stars form Cassiopeia’s distinctive W or M shape in northern skies.

17. 17Which term describes a natural object orbiting a planet?

    AnswerMoon

    Natural satellites, commonly called moons, remain gravitationally bound to planets or dwarf planets.

18. 18Astronaut spacesuits provide which gas for breathing?

    AnswerOxygen

    Spacesuits maintain a controlled oxygen supply and pressure while removing carbon dioxide and excess heat.

19. 19Why do annual meteor showers return at roughly the same time each year?

    AnswerEarth crosses streams of orbiting debris

    Comets and some asteroids leave debris trails that Earth encounters at predictable orbital locations.

20. 20Earth is orbited roughly monthly by which object?

    AnswerThe Moon

    The Moon completes one orbit relative to the stars in about 27.3 days.

21. 21What planet has a surface pressure strong enough to crush most unprotected spacecraft quickly?

    AnswerVenus

    Venus has a dense carbon-dioxide atmosphere producing about 90 times Earth’s sea-level pressure.

22. 22What space agency landed the Perseverance rover on Mars?

    AnswerNASA

    NASA’s Mars 2020 mission delivered Perseverance to Jezero Crater in 2021 according to modern astronomical observations.

23. 23Which open star cluster is popularly called the Seven Sisters?

    AnswerPleiades

    The Pleiades are a nearby young cluster whose brightest members are visible without a telescope.

24. 24Which spacecraft carried the dog Laika into Earth orbit?

    AnswerSputnik 2

    Sputnik 2 launched Laika in 1957, making her the first animal to orbit Earth.

25. 25Which phase occurs when the Moon appears fully illuminated from Earth?

    AnswerFull moon

    At full moon, Earth lies roughly between the Sun and Moon according to modern astronomical observations.