Cosmonauts Discover Toxic Coolant Leak During ISS Spacewalk

Russian cosmonauts conducting a spacewalk outside the International Space Station (ISS) encountered a growing "blob" of coolant leak from an external radiator. One of the cosmonauts' tethers became contaminated, requiring it to be left outside the space station. The cosmonauts isolated and documented the radiator, which had been observed leaking coolant earlier this month. They also noticed small holes on the radiator's panels. The cause of the leak will be determined by Russian engineers using the data collected. The spacewalk also involved the installation of a synthetic radar communications system and the release of a nanosatellite to test solar sail technology.