Categories: International Space Station

Scott Kelly Breaks U.S. Record Of Most Time Living In Space

U.S. astronaut and commander of the current International Space Station Expedition 45 crew, Scott Kelly, broke a human spaceflight record on Friday, October 16, 2015. That’s because Kelly reached his 383rd day of living in space on that date, surpassing U.S. astronaut Mike Fincke’s record of 382 cumulative days in space.

Kelly will break another record on October 29, 2015, which will be his 216th consecutive day in space, surpassing astronaut Michael Lopez-Alegria’s record for the single-longest spaceflight by an American. Lopez-Alegria spent 215 days in space as commander of the Expedition 14 crew in 2006.

Each additional day in orbit is part of Kelly’s one-year mission with cosmonaut Mikhail Kornienko to study the effects of long-duration spaceflight on humans. The pair arrived at the space station in March 2015 and are participating in studies during their 342 days in space that provide new insights into how the human body adjusts to weightlessness, isolation, radiation and stress of long-duration spaceflight. Kelly’s twin brother, former astronaut Mark Kelly, will participate in parallel twin studies on Earth to help scientists compare the effects on the body and mind in space.

Breaking such a record for time in space is important because every additional day helps us better understand how long-duration spaceflight affects bodies and minds, which NASA scientists say is critical to advancing the space agency’s future missions to Mars. The investigations in progress on the space station will help scientists better understand how to protect astronauts as they travel into deep space and eventually on missions to the Red Planet.

Kelly is scheduled to return to Earth on March 3, 2016, by which time he will have compiled 522 total days living in space during four missions.

Photo Credit: NASA

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