It should have been a routine mission to ferry about three tons of food, fuel, and supplies to the International Space Station, but when Russian cosmonauts opened the hatch to a cargo spacecraft on Saturday, they got a surprise—a toxic smell.
“After opening the Progress spacecraft’s hatch, the Roscosmos cosmonauts noticed an unexpected odor and observed small droplets, prompting the crew to close the Poisk hatch to the rest of the Russian segment,” NASA said in a statement on Sunday.
According to the space agency, air scrubbers and contaminant sensors on board the orbiting laboratory monitored the station’s atmosphere following the observation of the aberrant smell. By Sunday, flight controllers in Mission Control in Houston determined air quality inside the space station was at normal levels.