After a grease gun inside it exploded, and then watched how the bag and everything inside it floated away, without having the power to do something. This seems like one of the largest items ever lost by a spacewalker and it happened after Endeavour’s Heidemarie Stefanyshyn-Piper cleaned and lubed a gummed-up joint on a solar panel, in order to make it produce more power.

 Her fellow spacewalker, Stephen Bowen, also had a tool bag with another grease gun, putty knife and oven-like mitts to wipe away metal grit from the joint. Flight controllers are still assessing how the loss of the bag will affect the next three planned spacewalks.

Stefanyshyn-Piper and Bowen finished the spacewalk in almost seven hours by sharing tools from Bowen’s bag. Stefanyshyn-Piper is the first woman to be assigned as lead spacewalker for a shuttle flight. The other three spacewalks are scheduled on Thursday, Saturday and Monday, and the tool bag could be replaced with caulking guns in order to repair the space shuttle. Officials told the media that the bag hasn’t got any chances of hitting the space station or the docked space shuttle, and that’s because by late Tuesday it was already 2 and a half miles in front of the orbiting complex.

Meanwhile, inside the space station, crew members are working as hard as they can as they move equipment delivered by Endeavour that they’re in front of schedule and NASA flight planners think about skipping an extra day at the outpost. The equipment includes a recycling system that converts urine into water, a bathroom, a kitchenette, two bedrooms, an exercise machine and a refrigerator.

All of these will allow the ISS to host six crew members, instead of three. As for the water recycling system, the first batch of urine will run through the system by the end of the week. Samples will be flown back to Earth for safety tests before astronauts can drink it.