The astronauts aboard the International Space Station said Tuesday that ground controllers are figuring out how best to leave the vast complex running — what lights to leave on, which vents to keep open — in case it needs to be temporarily abandoned.

A Russian rocket carrying space station supplies failed during liftoff two weeks ago and crashed into Siberia. It’s the same type of rocket used to launch people to the station. Until Russian engineers can figure out what went wrong, all Soyuz launches are on hold.

Astronauts have been living aboard the station, without interruption, for almost 11 years.