Russian engineers assessing leak from Soyuz crew spacecraft

A Russian Soyuz crew ferry ship docked to the International Space Station spewed particles of an unknown substance, presumably coolant fluid, into space Wednesday night, forcing two Russian cosmonauts to call off a planned spacewalk as engineers on the ground scrambled to determine the source and the effects of the leak. Mission controllers first observed the leak around 7:45 p.m. EST Wednesday (0045 GMT Thursday), according to Rob Navias, a NASA spokesperson providing commentary on NASA TV. More

(Source: SpaceFlight Now - Dec 15)