Science · Guess the stat
Guess the real numbers behind planets, the Moon and the Space Station, see how everyone else guessed, and get the source.
About how many planets outside our solar system (exoplanets) have been confirmed as of September 2026?
Guess, see the crowd, get the real number. One ranked attempt per day.
Real figures with their sources. All Space facts →
since November 2000
It's run by five space agencies representing 15 countries, and the crew is usually seven people.
Source: NASA, International Space Station Facts and Figures nasa.gov
356 feet (109 meters)
That's one yard shy of an American football field including the end zones. Its living space is larger than a six-bedroom house.
Source: NASA, International Space Station Facts and Figures nasa.gov
238,855 miles (384,400 km)
That's enough room to fit 30 Earth-sized planets between Earth and the Moon.
Source: NASA Science, Moon Facts science.nasa.gov
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Each question asks you to guess a real number about outer space. After you answer you see how everyone else guessed, then the real figure and where it comes from.
Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.
Every stat links to its source, such as government statistics agencies, research organizations and industry groups. Figures are checked against the source before they go live.
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