Watch Russian cosmonauts make their 3rd try at a spacewalk tonight

Two Russian cosmonauts will attempt a twice-delayed spacewalk yet again tonight (April 18), and you can watch the action live.

Coverage of the International Space Station (ISS) spacewalk will start tonight at 9 p.m. EDT (0100 GMT Wednesday, April 19) here at, courtesy of NASA Television. Depending on how preparations go, the spacewalk should start around 9:30 p.m. EDT (0130 GMT) and last about 6 hours and 40 minutes, NASA's live page states.

ISS Expedition 69 cosmonauts Sergey Prokopyev and Dmitri Petelin have already made two tries at starting this set of space activities. A failed spacesuit pump aborted an attempt on Nov. 25, 2022. Just three weeks later, a Dec. 15 try was called off following a leak on a Russian Soyuz spacecraft that started just before the airlock was opened, spewing corrosive coolant into space.

Related: Leaky Soyuz spacecraft at space station returns to Earth in speedy landing

Russian cosmonauts Sergey Prokopyev (at right) and Dmitry Petelin prepare a large radiator for its move from the Rassvet mini-research module to the Nauka multipurpose laboratory module during a Nov. 17, 2022 spacewalk outside of the Russian segment of the International Space Station. (Image credit: NASA)

The cosmonauts will exit the station's Russian Poisk airlock on tonight's spacewalk, wearing Orlan spacesuits. "From there, the duo will maneuver to the Earth-facing side of the station and start the work of moving a radiator and an experiment module," a NASA blog post stated on April 13.

The spacewalkers will continue to prepare these two bulky pieces of equipment for transfer from the Rassvet module. The Rassvet radiator and experiment airlock were shipped to space in May 2010 aboard the STS-132 space shuttle mission. Now Russia's space agency Roscosmos plans to shift the equipment to the newer Russian Nauka science laboratory that launched to the ISS in 2021.

The work will take four spacewalks all told; one featuring Prokopyev and Petelin already completed all its tasks on Nov. 17, 2022. Pending tonight's extravehicular activity going to plan, the last two excursions will happen on April 25 and May 4 with the same two cosmonauts.

During all these spacewalks, cosmonaut Andrey Fedyaev will assist with robotic activities from inside the ISS using the European Space Agency's robotic arm on Nauka, including performing the equipment transfer after the preparation activities are complete.

Prokopyev will wear an Orlan spacesuit with red stripes for tonight's spacewalk, while Petelin will sport blue stripes on his.

Tonight's spacewalk will be the third at the ISS in 2023, following two NASA ones on Jan. 20 and Feb. 2. The EVA will be the second for Petelin and the fourth for Prokopyev, who already has nearly 22 hours of spacesuit time accumulated.

Elizabeth Howell is the co-author of "Why Am I Taller?" (ECW Press, 2022; with Canadian astronaut Dave Williams), a book about space medicine. Follow her on Twitter @howellspace. Follow us on Twitter @Spacedotcom or Facebook.

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Elizabeth Howell
Staff Writer, Spaceflight

Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: