On March 27, 2015, NASA astronaut Scott Kelly launched to the International Space Station. He surpassed the previous record for time spent in space by a U.S. astronaut on Oct. 16, 2015. After his return, he will have spent a total of 520 days in space across four space missions.
During the 340 days of this mission – which spanned four space station expeditions – Kelly and his one-year crewmate, Russian cosmonaut Mikhail Kornienko, have participated in a variety of research that will help scientists better understand how the human body reacts and adapts to long-duration spaceflight. That knowledge will play a critical role in future NASA missions deeper into the solar system and on the Journey to Mars, in which a round-trip mission is likely to last 500 days or longer.
In the last 340 days, Kelly has shared hundreds of incredible photos from space on Twitter, Instagram and Facebook.
NASA recently shared a 45-picture Flickr gallery entitled, Best Pics from #YearInSpace. You can find all of the stunning images below.
Astronaut Scott Kelly posted this photo of an aurora taken from the International Space Station to Twitter on August 15, 2015, with the caption, “Another pass through #Aurora. The sun is very active today, apparently. #YearInSpace”.