As I putter around my kitchen fixing toast and waking sleepy children for a routine Friday on earth, thousands of miles above my domesticity, two women are shattering the glass and atmospheric ceiling. 

Astronauts Christina Koch and Jessica Meir are busy changing out a battery pack on the International Space Station in the first all-female spacewalk in NASA history—or, as NASA has dubbed it, “HERstory”.

Watch the live feed here:

The duo was originally scheduled to replace a battery outside the space station three days from now, but the entire unit failed last week, changing NASA’s plan.

The all-female spacewalk is the first of its kind for NASA; before this outing, 213 men have floated in space to just 14 women. 

The spacewalk is scheduled to last about five-and-a-half hours, and the women started the job just before 8 a.m. eastern time. 

Koch is an electrical engineer who is on her fourth spacewalk and is seven months into an 11-month stay aboard the ISS. 

Meir is a marine biologist who arrived in space last month and is making her first spacewalk. 

The first all-female spacewalk was originally scheduled for March, but had to be rescheduled because NASA didn’t have enough spacesuits in size medium for the women. 

Carolyn Moore

Carolyn traded a career in local TV news for a gig as a stay-at-home mom, where the days are just as busy and the pay is only slightly worse. She lives in flyover country with her husband and four young kids, and occasionally writes about raising them at Assignment Mom