The spacewalk comes as NASA plans to return to the Moon by 2024 under the Artemis mission, named for the twin sister of Apollo in Greek mythology.
When Koch and McClain, who is no longer on the ISS, discovered they both needed to wear a size medium in the "hard upper torso", or the shirt of the spacesuit, the walk was canceled. This video was first released about a week before the actual live date of the spacewalk itself.
Replacing Dr. Morgan with Koch exemplified NASA's commitment to putting the most qualified astronaut on a spacewalk. The first woman to walk in space was Russian cosmonaut Svetlana Savitskayain 1984; NASA astronaut Kathryn Sullivan became the first female American spacewalker later that year. "There are a lot of people who derive motivation from inspiring stories of people who look like them, and I think it's an important story to tell".
ISS will reschedule three spacewalks to install new batteries in order to first replace a faulty battery charge/discharge unit (BCDU). She's seven months into a planned 11-month stay on the station.
She and Meir have trained in medium-sized suits for the past six years.
Trump praised the astronauts, Christa Koch and Jessica Meir, for their "historic" feat and hailed the women as "brave, brilliant women. who represent our country so well".
Bridenstine was part of a conference call from the White House, along with President Trump, Vice President Pence and the president's daughter and adviser, Ivanka Trump. What you do is incredible.
"Our achievements provide inspiration to students around the world, proving that hard work can lead you to great heights, and all students should be able to see themselves in those achievements", a NASA spokeswoman said in an emailed statement.
"I'm really looking forward to the opportunity to go out the hatch", Meir told the Press Herald in a September interview.
"I don't think I want to do it, I must tell you that", the president joked, "but you are awesome people".
"Congratulations, Christina and Jessica, on this historic event", he added. They will be the first two women to perform a spacewalk together, despite the fact that the first one took place in 1965. But according to Space.com, only 15 women have participated in spacewalks, and all were accompanied by men.