Impossible Space Facts: Real or Fake?

The questions

All 10 questions in this quiz. Correct answers stay hidden until you finish.

1. 1

   A day on Venus (one full rotation) is longer than a year on Venus (one orbit around the Sun).

   • Real
   • Fake
2. 2

   There are more stars in the observable universe than grains of sand on every beach on Earth.

   • Real
   • Fake
3. 3

   Mars has an underground liquid ocean larger than the Pacific Ocean.

   • Real
   • Fake
4. 4

   Saturn is less dense than water — it would theoretically float in a giant bathtub.

   • Real
   • Fake
5. 5

   Jupiter's Great Red Spot is a storm that first formed in 2010.

   • Real
   • Fake

Score bands

Your final score places you in one of these bands.

StargazerPure Imagination

The universe blows your mind, but the facts that sound too crazy to be true? You think they are. No worries — curiosity is where every explorer starts!

Sky WatcherGetting There

You know some space facts and watch the occasional science video. A few right, a few fooled — but you are already ahead of the pure guessers.

Cosmic DetectiveSharp Eye

You know your astronomy well enough that "sounds plausible" does not fool you. You are the friend who says "wait, that number seems off" when someone cites a space fact at a party.

Universe WhispererPerfect Score

You are a walking space encyclopedia. Neutron star density, Venus rotation, Saturn buoyancy — you know them all. We bow to your cosmic wisdom.

How this quiz works

Each question has one correct answer. When you finish, you get your score and can review every question with the correct answer and, where we have one, a short explanation.