USA/ Ax-4 mission with Uznański-Wiśniewski to start on Sunday at the earliest
06/18/2025 updated: 06/18/2025
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Axiom Space announced Tuesday that it has postponed the launch date of its Ax-4 mission to the International Space Station with Polish astronaut Sławosz Uznański-Wiśniewski. The flight could now take place no earlier than Sunday, June 22.
The company said in a new statement that changing the planned launch date from Thursday, June 19 to Sunday "will give NASA time to further evaluate space station performance following recent repair work to the Zvezda service module's aft segment."
A detected air leak and pressure loss in the Russian ISS module prompted an early postponement of the Axiom mission last week. NASA later said the pressure had stabilized after repairs were made, but was under further observation.
The mission was originally scheduled to launch on May 29, but has since been postponed several times due to technical issues with the Falcon 9 rocket and Dragon capsule, as well as weather.
The mission, which is to depart from NASA's Kennedy Space Center in Florida, is Axiom's fourth commercial flight to the ISS. The astronauts - former NASA astronaut Peggy Whitson (commander), pilot Shubhanshu Shukla from India, and scientific specialists Sławosz Uznański-Wiśniewski and Tibor Kapu from Hungary - will spend up to 14 days on the ISS, performing about 60 scientific experiments, including 13 prepared by Polish scientists. They will fly to the station aboard the Crew Dragon capsule - the last one created by SpaceX - for which this will be the first flight into space.
Uznański-Wiśniewski will be the first Polish astronaut on the International Space Station.
From Washington Oskar Górzyński (PAP)
osk/ san/
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