It circles Earth every 90 minutes. Sixty-five miles per hour may be a pretty standard speed limit on highways here on Earth, but up in … 15 Out-Of-This-World Facts About The International Space Station What is the International Space Station? ISS Operations The International Space Station is moving at a speed of 5 miles per second. Here's a look at the International Space Station (ISS), a spacecraft built by a partnership of 16 nations.