"Astronauts typically describe spacewalks as the most physically challenging thing they do", she said. Update, March 26: Adds information about spacesuit sizing and maintenance and NASA clarification on spacesuit availability on the ISS. During the excursion, they will continue work started by McCain and Hague to install powerful lithium-ion batteries for one pair of the station's solar arrays.
Instead, Koch will leave the vehicle with male astronaut Nick Hague instead.
Ms Dean said: 'Two upper parts in each of the three spacesuit sizes are available at the ISS: medium, large, extra large.
"Based [on] her experience in the first spacewalk in the series, McClain determined that although she has trained in both medium and large torsos, the medium, which she wore last Friday during the spacewalk, was a better fit for her in space", NASA spokeswoman Stephanie Schierholz told NPR in an email.More news: Liverpool manager Klopp admits tough to stop 'exceptional' Haaland
"In this case, it's easier (and faster!) to change space-walkers than reconfigure the spacesuit".
The rub appears to be that McClain and Koch need a medium-size hard upper torso component of the spacesuit, and only one will be ready for Friday. They don't have male and female versions, but consist of a mix-and-match collection of parts - torso, arms, gloves etc. - that come in several sizes, to ensure proper fit for each astronaut. "I remember telling my mom at that time, and I never deviated from what I wanted to be".
You're just going to have to wait a little longer for an all-female spacewalk. "Something about exploration has fascinated me from a young age".
A historic spacewalk was scheduled to occur this week with only women operating outside the ISS for the first time ever, but the mission was aborted due to ill-fitting suits. Flight director Mary Lawrence and lead spacewalk officer Jacklyn Kagey, as well as Canadian Space Agency flight controller Kristen Facciol, were on-hand to support the astronauts from the ground, rounding out the women's team. Last week McClain posted a video of her doing a "loop scrub" on a suit, necessary to keep the cooling system running properly. The mission was doubly significant as it brought an inspiring close to Women's History Month (March) in the US.More news: Jones wins 2nd Australian Open golf crown
When asked about the importance of conducting her mission during Women's History Month, she said, "It is a unique opportunity, and I hope that I'm able to inspire folks that might be watching".
"If that's a role that I can serve", she said, "it would be my honor to do that".
Koch is an electrical engineer who made her debut space flight with the current Expedition 59.More news: MLB The Show seems set for release on Switch in 2021