Swollen eyeballs, baby-like skin, and the overview effect: how astronauts feel when they return to earth

As Barry Wilmore and Suni Williams prepare to come home after their unexpected nine-month ISS stay, here is what they may experience

Gravity may seem like a drag, but spending long periods of time without its grounding force can wreak havoc on your body. On Friday, Nasa and SpaceX will launch the space agency's Crew-10 mission to the International Space Station to retrieve astronauts Barry Butch" Wilmore and Suni Williams, after what was meant to be an eight-day stay turned into nine months.

While it is not the most time a human has spent as an extraterrestrial - Oleg Kononenko and Nikolai Chub hold the record, with 374 days - most long space missions are a maximum of six months.