Former NASA astronaut Mike Massimino explains NASA's DART mission and why they intentionally crashed a spacecraft into an asteroid A coolant leak detected from the aft end of the Russian space capsule docked to the International Space Station was likely caused by a micrometeorite strike, according to a Russian space official. Sergei Krikalev, a veteran cosmonaut who serves as the director of crewed space flight programs at Roscosmos, said Thursday that a meteorite striking one of the radiators of the Soyuz MS-22 capsule could have caused the coolant to escape. Krikalev said in a statement that the malfunction could affect the performance of the capsule's coolant system and the temperature in the equipment section of the capsule. Roscosmos and NASA have both said that the incident had not posed any danger to the station's crew. "There have been no other changes in parameters on the Soyuz spacecraft and the station, so there is no threat for the crew," he said.