NASA astronauts Christina Koch and Jessica Meir exited the International Space Station at 07:38 am ET (12:38 pm BST) to begin the first all-female walk in a half-century of spacewalking.
Their job is to fix a broken part of the station’s solar power network.
The pair are currently moving to the space station’s P6 truss at the far end to begin work – where they will be replacing a failed power controller.
Taking more than five hours, the spacewalk is being streamed by NASA and is a landmark moment for female astronauts and scientists. Read more