Roscosmos Spacewalk 66 - YouTube Watch On Two cosmonauts will venture into the void today (May 27), and you can watch the action live. Sergey Kud-Sverchkov and Sergei Mikaev, of the Russian space agency Roscosmos , will perform a five-hour spacewalk outside the International Space Station (ISS) today, starting at about 10:15 a.m. EDT (1415 GMT). You can watch it live here at Space.com, courtesy of NASA, or directly via the agency . Coverage will begin at 9:45 a.m. EDT (1345 GMT). Cosmonaut Sergey Ryzhikov is seen at the end of the European robotic arm as he works on a high‑resolution camera during a 6-hour spacewalk outside the International Space Station on Oct. 16, 2025. (Image credit: NASA) Kud-Sverchkov and Mikaev "will install a solar radiation experiment on the Zvezda service module and remove other science hardware from the Poisk and Nauka modules of the orbiting complex's Roscosmos segment," NASA officials wrote in a May 22 description of the spacewalk .…