Two NASA astronauts are set to complete the 200th spacewalk outside the International Space Station Friday.
For Jack Fischer, the Verge reports, it will be his first ever spacewalk. But Peggy Whitson is a pro. She holds the record for most spacewalks by a female U.S. astronaut (today will be her ninth), and she’s spent more days off the planet than any other woman (more than 500 days total). President Donald Trump called her last month to congratulate her on the milestone.
On Friday’s walk, Fischer and Whitson will make some necessary repairs to the space station. The space walk starts at 8 a.m. EST and is expected to continue for more than six hours.
More Must-Reads From TIME
- Jane Fonda Champions Climate Action for Every Generation
- Biden’s Campaign Is In Trouble. Will the Turnaround Plan Work?
- Why We're Spending So Much Money Now
- The Financial Influencers Women Actually Want to Listen To
- Breaker Sunny Choi Is Heading to Paris
- Why TV Can’t Stop Making Silly Shows About Lady Journalists
- The Case for Wearing Shoes in the House
- Want Weekly Recs on What to Watch, Read, and More? Sign Up for Worth Your Time
Write to Tessa Berenson at tessa.Rogers@time.com