Astronaut Scott Kelly's yearlong mission almost over - CBS News 8 - San Diego, CA News Station - KFMB Channel 8

Astronaut Scott Kelly's yearlong mission almost over

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In this July 12, 2015 photo, Astronaut Scott Kelly takes a photo of himself inside the Cupola, a special module of the International Space Station which provides a 360-degree viewing of the Earth and the station. (Scott Kelly/NASA via AP) In this July 12, 2015 photo, Astronaut Scott Kelly takes a photo of himself inside the Cupola, a special module of the International Space Station which provides a 360-degree viewing of the Earth and the station. (Scott Kelly/NASA via AP)
This April 24, 2015 photo provided by NASA shows astronaut Scott Kelly's personal living quarters on the International Space Station. Kelly sees his nearly completed one-year mission as a 'steppingstone' to Mars. America's record-breaking astronaut will s This April 24, 2015 photo provided by NASA shows astronaut Scott Kelly's personal living quarters on the International Space Station. Kelly sees his nearly completed one-year mission as a 'steppingstone' to Mars. America's record-breaking astronaut will s
In this Jan. 21, 2016 photo made available by NASA, one-year mission crew members Scott Kelly of NASA, left, and Mikhail Kornienko of Roscosmos celebrate their 300th consecutive day in space. By spending 340 days aboard the International Space Station, th In this Jan. 21, 2016 photo made available by NASA, one-year mission crew members Scott Kelly of NASA, left, and Mikhail Kornienko of Roscosmos celebrate their 300th consecutive day in space. By spending 340 days aboard the International Space Station, th
In this Dec. 21, 2015 photo, Expedition 46 Commander Scott Kelly participates in a spacewalk outside the International Space Station in which he and Flight Engineer Tim Kopra, not pictured, moved the station's mobile transporter rail car ahead of the dock In this Dec. 21, 2015 photo, Expedition 46 Commander Scott Kelly participates in a spacewalk outside the International Space Station in which he and Flight Engineer Tim Kopra, not pictured, moved the station's mobile transporter rail car ahead of the dock
In this April 9, 2015 photo made available by NASA, astronauts Terry Virts, bottom, and Scott Kelly perform eye exams in the Destiny Laboratory of the International Space Station as part of ongoing studies on vision health in microgravity. (NASA via AP) In this April 9, 2015 photo made available by NASA, astronauts Terry Virts, bottom, and Scott Kelly perform eye exams in the Destiny Laboratory of the International Space Station as part of ongoing studies on vision health in microgravity. (NASA via AP)

CAPE CANAVERAL, Fla. (AP) — Space superman Scott Kelly's yearlong mission is one for the NASA history books.

The NASA astronaut has been living at the International Space Station since last March. By the time he lands in Kazakhstan next week, he will have spent 340 consecutive days in space, a U.S. record.

Kelly will have completed 5,440 laps around the planet. Logged 143.8 million miles. Welcomed nine visiting spacecraft. Shared the place with 14 other humans, including his roommate for the long haul, Russian cosmonaut Mikhail Kornienko, also returning to Earth.

He drank nearly 200 gallons of recycled urine and sweat, collected from himself and everyone else on board.

He snapped hundreds of breathtaking pictures of the home planet and posted them on Instagram and Twitter as StationCDRKelly, not to be confused with ShuttleCDRKelly, retired astronaut Mark Kelly, his identical twin. The brothers have taken part in an unprecedented twins study over the past year.

The 52-year-olds say they're proud to have served as guinea pigs for future Mars expeditions. For NASA, getting astronauts to Mars in 20 years is what this yearlong mission is all about.

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