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UK astronaut Tim Peake runs marathon aboard space station

  • British astronaut Tim Peake in action running the London marathon while strapped to a treadmill to counter the lack of gravity at the International Space Station on Sunday April 24, 2016. While the official 2016 London Marathon was being run in London, Peake ran 26.2 miles on a treadmill in three hours 35 minutes 21 seconds, while aboard the space station in orbit 250km above the Earth.(EUROPEAN SPACE AGENCY (ESA) via AP) TV OUT

    British astronaut Tim Peake in action running the London marathon while strapped to a treadmill to counter the lack of gravity at the International Space Station on Sunday April 24, 2016. While the official 2016 London Marathon was being run in London, Peake ran 26.2 miles on a treadmill in three hours 35 minutes 21 seconds, while aboard the space station in orbit 250km above the Earth.(EUROPEAN SPACE AGENCY (ESA) via AP) TV OUT  (The Associated Press)

  • British astronaut Tim Peake in action running the London marathon while strapped to a treadmill at the International Space Station on Sunday April 24, 2016. While the official 2016 London Marathon was being run in London, Peake ran 26.2 miles on a treadmill in three hours 35 minutes 21 seconds, while aboard the apace station in orbit 250km above the Earth.(EUROPEAN SPACE AGENCY (ESA) via AP) TV OUT

    British astronaut Tim Peake in action running the London marathon while strapped to a treadmill at the International Space Station on Sunday April 24, 2016. While the official 2016 London Marathon was being run in London, Peake ran 26.2 miles on a treadmill in three hours 35 minutes 21 seconds, while aboard the apace station in orbit 250km above the Earth.(EUROPEAN SPACE AGENCY (ESA) via AP) TV OUT  (The Associated Press)

British astronaut Tim Peake has completed the London Marathon — from 250 miles (400 kilometers) above the Earth.

Peake ran the 26.2-mile (42-kilometer) race harnessed to a treadmill aboard the International Space Station, with a simulation of the route through London's streets playing on an iPad.

He finished in 3 hours and 35 minutes. Guinness World Records says that's a record for the fastest marathon in orbit. American astronaut Sunita Williams ran the Boston Marathon from space in 2007 in 4 hours and 24 minutes.

Peake, who is four months into a six-month stay aboard the space station, also sent competitors a good luck video message before Sunday's race.

The 44-year-old astronaut was one of more than 39,000 people running the marathon — the rest at ground level.