NASA's first all-female spacewalk 'finally happening' on Thursday or Friday

NASA's first all-female spacewalk is finally almost here — a new schedule change means astronauts Christina Koch and Jessica Meir will instead venture out of the International Space Station on Thursday or Friday morning, accordign to Business Insider.

The mission, which was originally scheduled for October 21, aims to replace a faulty battery part. It will be Meir's first spacewalk and Koch's fourth.

The historic spacewalk will begin at 7:50 a.m. ET on either October 17 or 18, depending on when the crew finishes preparing equipment. NASA will air live coverage on its website and on NASA television starting at 6:30 a.m. ET.

Koch was previously scheduled to do a spacewalk with another female astronaut, Anne McClain, in March. That would have been the first all-female crew in 18 years of spacewalking, but NASA cancelled the event because it did not have the right size spacesuits.