Lieutenant Norishige Kanai stated on social media that he was involved he would not match into the spacecraft that might return him to Earth.
Lt Kanai, 41, was chosen as an astronaut candidate by the Japan Aerospace Exploration Company (JAXA) in 2009.
He launched as JAXA’s crew consultant on Expedition 54 to the Worldwide House Station (ISS) in December.
Lt Kanai tweeted: “Good morning, everyone. I’ve a serious announcement at present. We had our our bodies measured after reaching area, and wow, wow, wow, I had truly grown by as a lot as 9cm!
“I grew like some plant in simply three weeks. Nothing like this since highschool. I am a bit apprehensive whether or not I will match within the Soyuz seat after I return.”
:: Form-shifting micro organism noticed on ISS
Astronauts are tightly measured for his or her placement within the Soyuz capsules which return them to Earth.
Though it’s regular for astronauts to develop a number of inches when in area, they all the time return to their common peak when again underneath the gravitational pull of the Earth’s floor.
Analysis by NASA has proven that area journey could cause atrophy within the muscle tissues supporting the backbone, which frequently do not return to regular even weeks after their return to Earth.
On the time, the researchers stated their work “might present useful physiological info to assist a manned mission to Mars”.