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Science · Guess the stat

How well do you know space missions?

Guess the real numbers behind NASA's space missions, see how everyone else guessed, and get the source.

Guess the statOne tap · see how everyone guessed

In total, how many people have ever walked on the Moon?

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An astronaut in a space suit stands in a desert landscape holding an American flag.
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Today's round

  • 4 stats to guess
  • 1 opinion poll
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Guess, see the crowd, get the real number. One ranked attempt per day.

Mission by the numbers

Real figures with their sources. All Mission facts →

6 landings

How many crewed Apollo missions successfully landed astronauts on the Moon?

Six separate Apollo missions successfully touched down on the lunar surface between 1969 and 1972.

Source: Wikipedia: Apollo program (2025) en.wikipedia.org

about $257 billion

Adjusted for inflation to 2020 dollars, about how much did the Apollo program cost in total?

The Apollo program was the largest peacetime research and development project in history.

Source: Wikipedia: Apollo program (2020) en.wikipedia.org

1977

In what year did NASA launch Voyager 1, still the most distant human-made object in space?

Voyager 1 launched in 1977 and, decades later, is still sending back data from interstellar space.

Source: Wikipedia: Voyager 1 (2025) en.wikipedia.org

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Questions

How does MissionSurvey.com work?

Each question asks you to guess a real number about space missions and space exploration. After you answer you see how everyone else guessed, then the real figure and where it comes from.

How is the daily round scored?

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.

Where do the numbers come from?

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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