A commercial module mounted outside the International Space Station last year will remain attached to the orbiting research complex for at least three more years, carrying out additional tests for future space habitats and serving as a storage closet for the lab’s crew.

An International Launch Services Proton rocket lifted off with a communications satellite for Intelsat and DirecTV at 0710 GMT (3:10 a.m. EDT) Thursday from the Baikonur Cosmodrome in Kazakhstan after a one-day delay to resolve an issue with an electrical connector on the booster.

SpaceX was already tasked with returning NASA astronauts Butch Wilmore and Suni Williams as part of the Crew-9 mission. That departure was delayed by NASA due to unresolved issues with the fifth Crew Dragon capsule that will launch the Crew-10 flight.