Having been in their own very special ‘social bubble’ for almost six months, three astronauts will return from the International Space Station tomorrow.

NASA‘s Chris Cassidy and Russia‘s Anatoly Ivanishin and Ivan Vagner have been crewing the orbiting laboratory as part of its so-called Expedition 63.

Although the COVID-19 pandemic had already begun when the trio arrived on the ISS on April 9, 2020, the global health crisis was not as severe as it is now.

In preparation for his return in a Soyuz capsule tomorrow evening, Mr Cassidy tweeted two pictures of himself donning a facemask onboard the space station. 

Having been in their own very special 'social bubble' for almost six months, three astronauts will return from the International Space Station tomorrow. In preparation for his return in a Soyuz capsule, NASA's Chris Cassidy tweeted pictures of himself donning a facemask

Having been in their own very special 'social bubble' for almost six months, three astronauts will return from the International Space Station tomorrow. In preparation for his return in a Soyuz capsule, NASA's Chris Cassidy tweeted pictures of himself donning a facemask

Having been in their own very special ‘social bubble’ for almost six months, three astronauts will return from the International Space Station tomorrow. In preparation for his return in a Soyuz capsule, NASA’s Chris Cassidy tweeted pictures of himself donning a facemask

‘Masked up on @Space_Station!’ Mr Cassidy tweeted on October 19, 2020.

‘Training myself for my new reality when I get home on Wednesday.’

As with all visitors to the International Space Station, Mr Cassidy and his crewmates went into isolation prior to their trip.

This precaution helps to ensure that astronauts do not accidentally bring newly contracted diseases onboard the station, where they could develop to endanger their health and those of the other crewmembers.

Normally this quarantine last for a couple of weeks prior to lift-off, but given the COVID-19 crisis, Mr Cassidy and colleagues were isolated for a whole month.

As part of Expedition 63, the trio have performed a series of spacewalks, undertaken routine maintenance on the station, carried out various experiments, installed a new space toilet and even identified the source of a mysterious air leak

NASA's Chris Cassidy (pictured, left) and Russia's Anatoly Ivanishin (middle) and Ivan Vagner (right) have been crewing the orbiting laboratory as part of its so-called Expedition 63

NASA's Chris Cassidy (pictured, left) and Russia's Anatoly Ivanishin (middle) and Ivan Vagner (right) have been crewing the orbiting laboratory as part of its so-called Expedition 63

NASA’s Chris Cassidy (pictured, left) and Russia’s Anatoly Ivanishin (middle) and Ivan Vagner (right) have been crewing the orbiting laboratory as part of its so-called Expedition 63

Although the COVID-19 pandemic had already begun when the trio arrived on the ISS, pictured, on April 9, 2020, the global health crisis was not as severe as it is now

Although the COVID-19 pandemic had already begun when the trio arrived on the ISS, pictured, on April 9, 2020, the global health crisis was not as severe as it is now

Although the COVID-19 pandemic had already begun when the trio arrived on the ISS, pictured, on April 9, 2020, the global health crisis was not as severe as it is now

In preparation for his return in a Soyuz capsule tomorrow evening, Mr Cassidy, pictured, tweeted photographs of himself donning a facemask onboard the space station

In preparation for his return in a Soyuz capsule tomorrow evening, Mr Cassidy, pictured, tweeted photographs of himself donning a facemask onboard the space station

In preparation for his return in a Soyuz capsule tomorrow evening, Mr Cassidy, pictured, tweeted photographs of himself donning a facemask onboard the space station

Expedition 63 will return from the International Space Station aboard the Soyuz MS-16 spacecraft, undocking at around 19:30 ET on Wednesday (00:30 BST Thursday).

The capsule is expected to touch down in Kazakhstan shortly before 23:00 ET on Wednesday (04:00 BST Thursday).

Their journey back to Earth will be available to watch via a livestream on NASA TV. 

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. 

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, a level of funding that is endorsed by the Trump administration and Congress.

A U.S. House of Representatives committee that oversees Nasa has begun looking at whether to extend the program beyond 2024.

Alternatively the money could be used to speed up planned human space initiatives to the moon and Mars.

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This post first appeared on Dailymail.co.uk

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