Astronaut Scott Kelly has come to the end of his #YearInSpace mission and is set to return to earth.
Having spent a mammoth 340 days on board the International Space Station he is the first American astronaut to have lived in space for this amount of time, the normal duration tends to be approx. six months.
NASA are conducting an experiment on Scott Kelly and his twin brother Mark Kelly who is a retired astronaut on how weightlessness affects the human body in hopes the research will help NASA's endeavours to Mars.
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"I think we'll learn a lot about longer-duration spaceflight and how that will take us to Mars someday," Kelly said in his final news conference from orbit.
"So I'd like to think that this is another of many steppingstones to us landing on Mars sometime in our future."
During his time on the ISS the astronaut has undertaken some extraordinary tasks including growing the first flower in space, playing ping pong with water and not forgetting the hundreds of incredible images he has tweeted giving us a glimpse of his life in space.
Scott Kelly Year In Pictures
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My last #sunrise from space! 5 of 5. #YearInSpace
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#Countdown We're down to a wakeup. #Earth. I'm coming for you tomorrow! #GoodNight from @space_station! #YearInSpace
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Take a leap and explore new possibilities! #GoodMorning & Happy #LeapDay from @space_station! #YearInSpace
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#Countdown 2 days & a wake-up! Getting closer to Earth & hope Mars too. #GoodNight from @space_station! #YearInSpace
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Likely my last pic of the #moon from space. Reminded me of my friend, #GeneCernan the @lastmanonmoon! #YearInSpace
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#Water #YearInSpace
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#fire #YearInSpace
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#Ice #YearInSpace
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#Countdown 3 days and a wake-up! Every end has a new beginning. #GoodNight from @space_station! #YearInSpace
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#sunrise #YearInSpace
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Five thousand #sunrises during my #YearInSpace. Wish I could have seen them all!
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#EarthArt Desert dunes. #YearInSpace
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Snow and ice make #Canada #EarthArt nice. #YearInSpace
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5 days & a wake-up! Every #mountain top is within reach. Keep climbing. #GoodNight from @space_station! #YearInSpace pic.twitter.com/3K5wTGEfWp
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The #himalayas remind me of the bigger view we see when we conquer the #mountains we climb. #YearInSpace.
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#GoodMorning from near the top of the world! #HappyHumpDay! #himalayas #YearInSpace
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#Countdown Counting #stars and days. 7 days and a wake up! #GoodNight from @space_station! #YearInSpace
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#Countdown Let's take this 16 sunsets at a time. 8 days to go tomorrow! #GoodNight from @space_station! #YearInSpace
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More #Africa #EarthArt hues. #YearInSpace
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Will be missing these sands too, but looking forward to sandy beaches up close. #EarthArt #Africa #YearInSpace
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I'm going to miss the colors of #Africa! #EarthArt. #YearInSpace
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Day 330. Tried to only count up. 10 days left tmrw I start #countdown! #GoodNight from @space_station! #YearInSpace
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Day 329. One night over #Macedonia. #GoodNight from @space_station! #YearInSpace
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All good things must come to an end. #Cygnus, your mission was a success! Farewell #SSDekeSlayton.
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Nominated for @ShortyAwards! Voting ends tonight 11:59ET http://shortyawards.com Thanks 4 following my #YearInSpace!
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Looks like another day of limitless possibilities! Greetings #Earth from @space_station! #YearInSpace
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#ColorsofEarth Snow white. #YearInSpace
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#ColorsofEarth Red and purple Terra Australis.
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#ColorsOfEarth Green sea. #YearInSpace
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It's a new day! Good morning from @space_station! #YearInSpace
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Day 325. Set your sails for the #stars! #GoodNight from @space_station! #YearInSpace
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Refreshing sight of #Bahamas blues! #YearInSpace
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Lights of #HoChiMinhCity #Saigon #Vietnam. #YearInSpace
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That #polarvortex even looks cold from here! #Burr! #YearInSpace
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#EarthArt #Iran #YearInSpace
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Day 321. Beautiful #Earth. Beautiful #Africa. #GoodNight from @space_station! #YearInSpace
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Posted this pic last week. Many of you asked: What is it? I answer on @Tumblr!5K times around Earth can seem like #GroundhogDay but still a privilege. #GoodNight frm @space_station! #YearInSpace
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Good afternoon #Egypt! Hope to see you up close some day. #YearInSpac
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#fuji san, your majesty casts a wide shadow! #Japan YearInSpace!
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Day 318. Over a #Shanghai night. Wishes for a happy #ChineseNewYear! #GoodNight from @space_station! #YearInSpace
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#CentralAmerica you were particularly brilliant this morning! #YearInSpace
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#goodmorning #February! My 11th full month is space! Thanks for having an extra day! #LeapYear2016 #YearInSpace!
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Day 309. #Aurora nights. #GoodNight from @space_station! #YearInSpace
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Had a great view of #WashingtonDC yesterday morning! #YearInSpace
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#Italy and the #Alps last night were breathtaking! #YearInSpace
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Day 304. That's 4,864 orbits a'round' our beautiful planet #Earth. #GoodNight from @space_station! #YearInSpace
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Just joined @Tumblr from space! #Blizzard2016 inspired 1st post: Chasing Storms http://tmblr.co/ZmuJBi20aFgEL #YearInSpace
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#blizzard2016 clearly seen off the #EastCoast as the sun begins to rise. Hope all OK! #BlizzardJonas #YearInSpace
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Day 302. #Blizzard2016 gave us an impressive view below. Stay warm! #GoodNight from @space_station! #YearInSpace
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Rare #thundersnow visible from @Space_Station in #blizzard2016! #Snowzilla #snowmaggedon2016 #YearInSpace
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O Canada! Beneath thy shining skies. You were beautiful this morning! #YearInSpace
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The dance of #aurora. #YearInSpace pic.twitter.com/OOc4CX9kG5
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#goodmorning #aurora and the Pacific Northwest! #YearInSpace
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Advice from a #volcano: keep your inner fire burning. #YearInSpace pic.twitter.com/M3R6ktdD7T
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#GobiDesert is said to be so long it would take the length of my mission to travel from end to end. #YearInSpace
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Sad to learn of the death of musician @DavidBowieReal whose inspiration lives on "far above the world" #YearInSpace
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Day 289. Out over the blue. #GoodNight from @space_station! #YearInSpace
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Day 288. Dream big. #GoodNight from @space_station! #YearInSpace pic.twitter.com/0c6dY32lhz
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Day 240. Nighttime falls softly over #CostaDelSol and #FrenchRiviera. #GoodNight from @space_station! #YearInSpace
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#EarthArt #SouthAmerica #YearInSpace
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#EarthArt #SouthAmerica #YearInSpace
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#EarthArt #SouthAmerica #YearInSpace
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Pictures like this make me really regret that my watercolors didn't make it up here. #EarthArt #YearInSpace
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Day 239. When #mountains sleep. #Himalayas at night. #GoodNight from @space_station! #YearInSpace
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#EarthArt #Africa #YearInSpace
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#EarthArt #Africa #YearInSpace
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#EarthArt #Africa #YearInSpace
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#EarthArt #Africa #YearInSpace
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#EarthArt #Africa. #YearInSpace
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Sun can be blinding up here some mornings. #GoodMorning from @space_station! #YearInSpace
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Day 238 #India, #Pakistan and the #Tibetan Plateau make for a #GoodNight from @Space_Station #Himalayas #YearInSpace
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#EarthArt #Africa. #YearInSpace.
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#EarthArt #Africa. #YearInSpace.
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#EarthArt #Africa. #YearInSpace
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Took some great shots of #Africa this morning that I'll post today and this weekend. #EarthArt #YearInSpace
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#GoodMorning #LasVegas! (although you probably haven't gone to sleep yet). #Vegas #YearInSpace
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Saw some big rip currents in #mozambique today. These can be very dangerous. Be careful. #YearInSpace
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#Bermuda out of the blue #YearInSpace
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#EarthArt A swirl of green runs through it. #YearInSpace
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Looks like #sunrise came with some enthusiasm. #GoodMorning #USA from @space_station! #YearInSpace
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Day 236. A sheet of #clouds blanket our beautiful #Earth. #GoodNight from @space_station! #YearInSpace
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#EarthArt Looks like cubism over #USA #YearInSpace
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#EarthArt #USA #YearInSpace
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#California in a golden state just before sunrise. #GoodMorning from @space_station! #YearInSpace
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Day 235. The #sun takes a bow as the day is done. Good night from @space_station! #YearInSpace
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Unmistakably #Africa. #YearInSpace
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Nothing like a little #aurora to get things started. Good morning from @space_station! #YearInSpace
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Day 234. #Dubai shines at night. #GoodNight from @space_station! #YearInSpace
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#SouthAfrica You always have a way of showing something beautiful right down to the tip of your cape. #YearInSpace
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Even in darkness the #GreatLakes are unmistakable. #GoodMorning from @Space_Station #YearInSpace
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Day 233. Once upon a #star over Southern India. #GoodNight from @space_station! #YearInSpace
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#SundayNFLStadiumPicFromSpace #NFLGameDay #Philadelphia @Eagles #YearInSpace
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#SundayNFLStadiumPicFromSpace #NFLGameDay #BAltimore @Ravens
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Today is a new day with limitless possibilities to do great things. #GoodMorning from @Space_Station #YearInSpace
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Shocked & saddened by terrorist attacks on #Paris Standing with #France from @space_station. Our thoughts are w you.
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#EarthArt Made a few passes over #USA today. #YearInSpace
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#FlashbackFriday from last Friday. @astro_kjell and I working on something bigger than the two of us. #YearInSpace
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#FlashBackFriday Last Friday #spacewalk. Seems like I've held this position all week but on the inside. #YearInSpace
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Day 230. You have to climb to reach the #stars. But the view is great. #GoodNight from @space_station! #YearInSpace
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#ThrowbackThursday I admit, last week I took a #selfie at work. #YearInSpace
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Day 229. Bright night. #GoodNight from @space_station! #YearInSpace
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Salute from 250 mi above to all past and present veterans and families. You are my heroes. #VeteransDay #YearInSpace
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Day 228. #Sunrise with the #stars is not a bad way to end a day. #GoodNight from @space_station! #YearInSpace
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Teamwork! @astro_kjell and I working outside @Space_Station with @Astro_Kimiya inside getting us safely out the door
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On the grid! Back from #spacewalk & tweet ability down. Real-life lesson in importance of connectivity. #YearInSpace
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For an instant before sunrise, the space station glows orange. #GoodMorning from @Space_Station! #YearInSpace
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Day 222. Sleep by the light of the #moon. #GoodNight from @space_station! #YearInSpace
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#Desert #EarthArt #YearInSpace
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#Desert #EarthArt #YearInSpace
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#Desert #EarthArt #YearInSpace
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Day 221. Lights out! #GoodNight from @space_station! #YearInSpace
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Happy #NationalSandwichDay! One of my favorite sandwiches has its roots right down there. Any guesses? #YearInSpace
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#Desert #EarthArt Not a color you might expect to see here. #YearInSpace
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#Desert #EarthArt Some of the most inhabitable places on Earth are some of the most beautiful. #YearInSpace
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#GoodMorning #Earth. Looking brilliant as usual. #YearInSpace
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Day 220. A cloud over #Qatar reminds me of the pillow I miss at sleep. #GoodNight from @space_station! #YearInSpace
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No better place to celebrate #15YearsOnStation! #HappyBday, @space_station! Thanks for the hospitality! #YearInSpace
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#Sinai Peninsula this morning from @space_station. #YearInSpace
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Day 219. The #sun will come out 16 times tomorrow. #GoodNight from @space_station! #YearInSpace
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#SundayNFLStadiumPicFromSpace #SoldierField taken during #NFLGameDay game! Who's in this picture? #YearInSpace
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#Paris as it appeared this morning from @Space_Station. #COP21 @UN #YearInSpace
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#Greetings to the participants of #COP21 in #Paris from @Space_Station. #Earth is our spaceship. We must protect it.
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Day 218 Bewitching hour on #Earth. Have fun, be safe. #HappyHalloween & #GoodNight from @space_station! #YearInSpace
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Oct 31 #Halloween #EarthArt Some places of our world look other worldly. Boo! #YearInSpace
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Oct 31 #Halloween #EarthArt #YearInSpace
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Oct 31 #Halloween #EarthArt For all you zombies below. Brains! #YearInSpace
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Oct 31 #Halloween #EarthArt #YearInSpace
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Oct 31 #Halloween #EarthArt Ghostly and dark but beautiful too. #YearInSpace
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Oct 31#Halloween #EarthArt Eerie lake. #YearInSpace
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Oct 31 #Aurora's sinister face, & other spooky scenes from @space_station on my #YearInSpace coming at you #HappyHalloween!
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Oct 31 #TropicalStorm #Ashobaa churns off the coast of #Oman. Stay safe down there. #YearInSpace
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Oct 30 Day 217. #Moon sets. May the howling begin. #GoodNight from @space_station! #YearInSpace
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Oct 30 Day 216. Seeing our world in a new light tonight. #GoodNight from @space_station! #YearInSpace
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Oct 29 Coming back in yesterday. Still trying to wrap my head around why we call it #spacewalk, not spacework. #YearInSpace
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Oct 29 #SpaceWalkSelfie Back on the grid! Great first spacewalk yesterday. Now on to the next one next week. #YearInSpace
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Oct 27 Day 212 Getting my game face on for #spacewalk Thanks for sticking w me #GoodNight from @space_station! #YearInSpace
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Oct 26 #MondayMotivation A subtle #sunrise but was enough to get us started. #GoodMorning from @space_station! #YearInSpace
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Oct 25 Day 211. Night calling #SouthAfrica like it is calling me. #GoodNight from @space_station! #YearInSpace
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Caught this #morning storm over SE #Asia yesterday. #GoodMorning from @Space_Station! #YearInSpace pic.twitter.com/EP7gRfu
Tim Peake Spacewalk
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