A privately-funded airlock from Nanoracks will head for the International Space Station this weekend in the trunk of a SpaceX Cargo Dragon capsule, adding to the orbiting lab’s capacity for scientific experiments in another milestone for commercial space development.

Citing a tropical storm in the downrange booster recovery zone, SpaceX said Monday that a launch of up to 60 more Starlink Internet satellites previously planned this week from Cape Canaveral has been delayed until after the launch of the company’s first crewed flight.

After a lull in launch activity this fall, SpaceX teams at Cape Canaveral are preparing for up to four Falcon 9 missions in December to close out 2019 with a surge of launches.