Three NASA astronauts and a European astronaut are returning home from the ISS

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Four astronauts are returning to Earth later after a six-month stay on the International Space Station.

They have been working alongside Russian cosmonauts and became part of history when they hosted the first all-private crew to visit the orbiting outpost last month.

The three NASA astronauts and one European climbed aboard a SpaceX Crew Dragon capsule shortly after 05:00 BST (00:00 ET) and left the space station just over an hour later.

Raja Chari, Tom Marshburn, and Kayla Barron, as well German-born European Space Agency astronaut Matthias Maurer, will spend 23 hours flying home before splashing down off the coast of Florida at about 05:43 BST (00:43 ET) tomorrow (Friday).

The SpaceX Crew Dragon will hit the Earth’s atmosphere at more than 22 times the speed of sound, putting the astronauts through intense G-forces as the final portion of their descent begins.

Four astronauts are returning to Earth later after a six-month stay on the International Space Station. From left, the European Space Agency's Matthias Maurer, plus NASA astronauts Tom Marshburn, Raja Chari, and Kayla Barron are due to splash down off Florida tomorrow (Friday)

Four astronauts are returning to Earth later after a six-month stay on the International Space Station. From left, the European Space Agency’s Matthias Maurer, plus NASA astronauts Tom Marshburn, Raja Chari, and Kayla Barron are due to splash down off Florida tomorrow (Friday)

The three NASA astronauts and one European climbed aboard a SpaceX Crew Dragon capsule shortly after 05:00 BST (00:00 ET) and left the space station just over an hour later

The three NASA astronauts and one European climbed aboard a SpaceX Crew Dragon capsule shortly after 05:00 BST (00:00 ET) and left the space station just over an hour later

WHICH ASTRONAUTS ARE RETURNING FROM THE ISS?

Raja Chari, 44

An American test pilot and NASA astronaut, Chari was born in Wisconsin before later graduating from Massachusetts Institute of Technology, the United States Air Force Academy and US Naval Test Pilot School.

He is a colonel with over 2,000 flying hours to his name.

Tom Marshburn, 61

An American physician and NASA astronaut, Marshburn is a veteran of three spaceflights to the International Space Station.

He was commander on his last mission, before handing over the responsibility to Russian cosmonaut Oleg Artemyev. 

Kayla Barron, 34

An American submarine warfare officer and engineer, Barron was selected in June 2017 as a member of the NASA Astronaut Group 22.

She studied at the University of Cambridge and has carried out two spacewalks during her time in orbit. 

Matthias Maurer, 52

German European Space Agency astronaut Maurer was a materials scientist who was selected in 2015 to take part in space training.

He successfully graduated from both basic astronaut training and pre-assignment training in 2018.

If all goes smoothly, the craft, dubbed Endurance, will parachute into the sea while carrying some 550 pounds of cargo from the science mission.

Earlier today, live video showing the capsule drifting away from the station as the two vehicles soared high over Australia was shown on a NASA webcast.

Wearing helmeted white-and-black spacesuits, the four astronauts were seen strapped into the crew cabin shortly before the spacecraft separated from the space station, orbiting some 250 miles (400 km) above the Earth.

A series of several brief rocket thrusts then autonomously pushed the capsule safely clear of the ISS and lowered its orbit to line up the spacecraft for later atmospheric re-entry and splashdown.

‘Teams from @NASA & @SpaceX now are targeting #Crew3 undocking at 1:05 am Thurs, May 5 from @Space_Station,’ NASA human spaceflight chief Kathy Lueders said via Twitter today, referencing times in ET.

‘Splashdown off of Florida’s coast is planned about 12:37 am Fri, May 6. The new undocking time allows for shorter phasing & more time to review the latest forecast info.’

She added: ‘Weather is being watched closely to confirm selected primary & alternate sites are good for return, and we’ll conduct another weather review about 24 hours before undocking to determine whether we are GO to proceed. More to come.’

The Endurance crew, including Marshburn, 61, Chari, 44 and Barron, 34 and Maurer, 52, arrived at the space station on November 11 last year.

Their departure came about a week after they welcomed their replacement team aboard the station, also currently home to three Russian cosmonauts on a long-term mission.

One of those cosmonauts, Oleg Artemyev, assumed command of the International Space Station from Marshburn in a handover before Thursday’s undocking, NASA said. 

The Endurance crew, including Marshburn, 61, Chari, 44 and Barron, 34 and Maurer, 52, arrived at the space station on November 11 last year

The Endurance crew, including Marshburn, 61, Chari, 44 and Barron, 34 and Maurer, 52, arrived at the space station on November 11 last year

Earlier today, live video showing the capsule drifting away from the station as the two vehicles soared high over Australia was shown on a NASA webcast

Earlier today, live video showing the capsule drifting away from the station as the two vehicles soared high over Australia was shown on a NASA webcast

The NASA-ESA team flying home today has been officially designated'Crew 3', the third full-fledged long-duration group of astronauts that SpaceX has launched to the space station

The NASA-ESA team flying home today has been officially designated ‘Crew 3’, the third full-fledged long-duration group of astronauts that SpaceX has launched to the space station

Earlier in April, a separate all-private astronaut crew launched by SpaceX to the space station under contract for the Houston-based company Axiom Space left the orbiting laboratory, concluding two weeks in orbit.

Three wealthy businessmen — who each paid $55 million (£41 million) to take part in the trip — were joined by a former NASA astronaut for the history-making mission, which was organised by startup company Axiom Space.

Canadian investor Mark Pathy, US entrepreneur Larry Connor, ex-Israeli Air Force pilot Eytan Stibbe and retired astronaut Michael López-Alegría had been due to spend eight days carrying out scientific experiments on the space station.

But bad weather repeatedly delayed their departure, meaning they actually worked alongside the seven regular, government-paid crew for a total of 16 days.

The NASA-ESA team flying home today has been officially designated ‘Crew 3’, the third full-fledged long-duration group of astronauts that SpaceX has launched to the space station for the US space agency.

California-based SpaceX was founded in 2002 by billionaire Elon Musk, who recently clinched a deal to buy social media platform Twitter.

The company has launched a total of seven human spaceflights over the past two years.

EXPLAINED: THE $100 BILLION INTERNATIONAL SPACE STATION SITS 250 MILES ABOVE THE EARTH

The International Space Station (ISS) is a $100 billion (£80 billion) science and engineering laboratory that orbits 250 miles (400 km) above Earth.

It has been permanently staffed by rotating crews of astronauts and cosmonauts since November 2000. 

Crews have come mainly from the US and Russia, but the Japanese space agency JAXA and European space agency ESA have also sent astronauts. 

The International Space Station has been continuously occupied for more than 20 years and has been expended with multiple new modules added and upgrades to systems

The International Space Station has been continuously occupied for more than 20 years and has been expended with multiple new modules added and upgrades to systems 

Research conducted aboard the ISS often requires one or more of the unusual conditions present in low Earth orbit, such as low-gravity or oxygen.

ISS studies have investigated human research, space medicine, life sciences, physical sciences, astronomy and meteorology.

The US space agency, NASA, spends about $3 billion (£2.4 billion) a year on the space station program, with the remaining funding coming from international partners, including Europe, Russia and Japan.

So far 244 individuals from 19 countries have visited the station, and among them eight private citizens who spent up to $50 million for their visit.

There is an ongoing debate about the future of the station beyond 2025, when it is thought some of the original structure will reach ‘end of life’.

Russia, a major partner in the station, plans to launch its own orbital platform around then, with Axiom Space, a private firm, planning to send its own modules for purely commercial use to the station at the same time. 

NASA, ESA, JAXA and the Canadian Space Agency (CSA) are working together to build a space station in orbit around the moon, and Russia and China are working on a similar project, that would also include a base on the surface. 

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