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A coolant leak has been detected in a backup line at the International Space Station (ISS), though no danger to the crew or the facility has been identified.

The Russian space agency, Roscosmos, reported that the leak originated from an external backup radiator for their new science lab, Nauku. Despite the incident, the lab’s primary thermal control system is functioning normally. According to Roscosmos, “The crew and the station aren’t in any danger.”

NASA also confirmed the safety of the seven-member crew and stated that the ISS operations are proceeding as scheduled.

This incident isn’t isolated, as similar coolant leaks from Russian spacecraft attached to the ISS have been observed recently. Investigations into those leaks concluded that they were likely caused by micro-meteoroid strikes, rather than manufacturing defects. Notably, one Soyuz capsule leak led to an extended orbital stay for NASA astronaut Frank Rubio and his Russian colleagues, lasting 371 days instead of the planned six months, necessitating a replacement capsule for their return.