Alison Francis
Senior Science Journalist
Watch: Moment Nasa astronauts statesman their travel backmost to Earth
After an epic 9 months successful space, Nasa astronauts Butch Wilmore and Suni Williams are finally on their measurement home.
Their enactment connected nan International Space Station (ISS) was only expected to past 8 days, but their ngo was dramatically extended aft nan spacecraft that they arrived connected suffered method problems.
The brace are travelling backmost to Earth successful a SpaceX capsule on pinch Nasa astronaut Nick Hague and Russian cosmonaut Aleksandr Gorbunov.
They undocked from nan ISS astatine 05:05 GMT (01:05 EDT) connected Tuesday and are group to scatter down disconnected nan seashore of Florida later nan aforesaid day, astatine 21:57 GMT (17:57 EDT) .
NASA
Butch Wilmore and Suni Williams person been connected nan ISS since June 2024
Their landing time, however, could alteration if nan upwind conditions are not bully enough.
It will people nan extremity of a ngo that has grabbed nan world's attention, nevertheless nan last stages of their travel won't beryllium easy.
The SpaceX Dragon capsule will make a accelerated and fiery re-entry done nan Earth's atmosphere, enduring temperatures of up to 1600C.
As it quickly slows, nan astronauts will acquisition important g-forces, astir 4 times nan Earth's gravity.
Finally, 4 ample parachutes will open, allowing nan trade to onshore mildly successful nan ocean.
Helen Sharman, Britain's first astronaut, said nan thrilling thrust would beryllium worthy it.
"They're knowledgeable astronauts but they will consciousness awesome to beryllium backmost connected Earth. The caller aerial is nan first point that gets you," she told BBC News.
The saga of Butch and Suni began successful June 2024.
They were taking portion successful nan first crewed trial formation of nan Starliner spacecraft, developed by aerospace institution Boeing.
But nan capsule suffered respective method problems during its travel to nan abstraction station, and it was deemed excessively risky to return nan astronauts home.
Starliner returned safely to Earth quiet successful early September, but it meant nan brace needed a caller thrust for their return.
So Nasa opted for nan adjacent scheduled flight: a SpaceX capsule that arrived astatine nan ISS successful precocious September.
It flew pinch 2 astronauts alternatively of four, leaving 2 seats spare for Butch and Suni's return. The only drawback was this had a planned six period mission, extending nan astronauts enactment until now.
The presence of a replacement unit connected Sunday was nan last measurement needed for Butch and Suni's return – and aft a short manus complete pinch nan caller team, their ngo is now astatine an end.
NASA
Butch and Suni carried retired experiments while onboard nan ISS
The Nasa brace person embraced their longer than expected enactment successful space.
They've carried retired an array of experiments connected committee nan orbiting laboratory and conducted spacewalks, pinch Suni breaking nan grounds for nan female who's spent nan astir hours extracurricular of nan abstraction station.
And contempt nan astronauts being described arsenic "stranded" they ne'er really were.
Throughout their ngo location person ever been spacecraft attached to nan abstraction position to get them - and nan remainder of those onboard - location if location was an emergency.
Speaking successful nan weeks earlier their departure, Butch Wilmore said they weren't fazed erstwhile their ngo was extended.
"We came up prepared to enactment long, moreover though we scheme to enactment short. That's what we do successful quality abstraction flight. That's what your nation's quality abstraction formation programme is each about," he said.
Suni added that she was sad this would astir apt beryllium her past mission.
"I deliberation conscionable nan truth that we're surviving up here, successful this very unsocial place, gives you an astonishing perspective," she said. "I don't want to suffer that spark of inspiration erstwhile I leave, truthful I'm going to person to vessel it somehow."
NASA
Butch and Suni's thrust location launched successful September
The pair's ngo attracted moreover much publicity past period aft SpaceX CEO Elon Musk said that nan astronauts had been near successful abstraction for governmental reasons, and his institution could person brought them location sooner.
But Nasa officials said their decisions were based connected formation scheduling and nan abstraction station's needs.
Garrett Reisman, a erstwhile Nasa astronaut and erstwhile head of abstraction operations astatine SpaceX, said location were bully reasons why Nasa didn't opt for a dedicated rescue mission.
"It wasn't going to trim nan magnitude of clip that Butch and Suni spent successful abstraction by very overmuch - I mean, you'd shave a mates of months off, truthful nan use wasn't that great," he told BBC News.
"And nan costs was precocious - these unit missions costs hundreds of millions of dollars…. I deliberation Butch and Suni would person been nan first ones to opportunity 'no, that's not worthy it'."
NASA
Butch and Suni conducted spacewalks while onboard nan abstraction station
Once nan astronauts person arrived home, they will beryllium taken to nan Johnson Space Centre successful Houston, Texas, wherever they will beryllium checked complete by aesculapian experts.
Long long missions successful abstraction return a toll connected nan body, arsenic astronauts suffer bony density and suffer musculus loss. Blood circulation is besides affected, and fluid shifts tin besides effect eyesight.
It tin return a agelong clip for nan assemblage to return to normal, truthful nan brace will beryllium fixed an extended workout authorities arsenic their bodies re-adapt to surviving pinch gravity. But nan first privilege for Butch and Suni will beryllium to spot their families, friends - and pets.
Garrett Reisman has been successful touch pinch his friend Suni while she's been successful space.
"I had an email from Suni conscionable nan different time wherever she talked astir missing sitting connected nan structure successful her location successful Maine pinch nan dogs, and smelling nan caller air, emotion nan sun connected your face," he told nan BBC.
"It's nan basal things astir life present connected Earth that you miss."