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.
How much farther from Earth does the Moon drift each year?
Guess, see the crowd, get the real number. One ranked attempt per day.
Real figures with their sources. All Space facts →
6,366 confirmed planets
The count has soared in just over three decades since the first exoplanets were found, and scientists believe billions exist.
Source: NASA Exoplanet Archive exoplanetarchive.ipac.caltech.edu
16 orbits
Traveling about five miles per second, the crew sees 16 sunrises and sunsets every day.
Source: NASA, International Space Station Facts and Figures nasa.gov
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
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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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