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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

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

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space missions and space exploration
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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 →

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

over 25 years

How long has the International Space Station been continuously occupied by astronauts, as of 2025?

The ISS holds the record for the longest continuous human presence in space, over 25 years and counting.

Source: Wikipedia: International Space Station (2025) en.wikipedia.org

about 27,600 km/h

About how fast does the International Space Station travel as it orbits Earth?

The ISS circles the Earth at nearly 8 kilometers per second to stay in orbit.

Source: Wikipedia: International Space Station (2025) en.wikipedia.org

What people think about space missions and space exploration

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Which excites you most about space exploration?

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Would you want to travel to space if given the chance?

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What should be humanity's next big space goal?

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One Mission stat a week

A surprising, sourced space missions and space exploration number and that week's poll, in your inbox every Monday. Free, and you can stop any time.

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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