Technology
How much did it cost to build the International Space Station?
$150 billion
Background
Building the International Space Station cost around 150 billion US dollars. That makes it the most expensive single object humans have ever built. Fifteen nations worked on assembly in space from 1998 to 2011. The station orbits Earth at 400 kilometers up. It flies at 28,000 km/h and circles the planet every 90 minutes.
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