WASHINGTON — A Russian module on the International Space Station continues to suffer an air leak after hopes that recent repairs had resolved the long-running problem.

At a July 30 press conference about the launch of the Crew-11 mission to the ISS, scheduled for 12:09 p.m. Eastern July 31, a senior Roscosmos official said a leak persisted in a portion of the Zvezda service module even after recent repairs.

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Jeff Foust writes about space policy, commercial space, and related topics for SpaceNews. He earned a Ph.D. in planetary sciences from the Massachusetts Institute of Technology and a bachelor’s degree with honors in geophysics and planetary science...