ISS Faces Leaking Backup Circuit, Russian Space Agency Reports

The Russian space agency, Roscosmos, is investigating a coolant leak on the International Space Station (ISS) that affected a backup radiator circuit on the Nauka module. The primary thermal control circuit is functioning normally, and the crew is not in danger. The cause of the leak is unknown. This incident adds to the mechanical issues Roscosmos has faced in low-Earth orbit, including a coolant leak on a Soyuz spacecraft and a Progress vehicle. Debris in orbit is a growing concern, with the number of uncontrolled objects increasing due to collisions and anti-satellite weapons tests.