“Baby came back,” Space CEO Elon Musk wrote on Instagram after the successful landing.

The historic launch comes a month after SpaceX successfully launched its first Falcon 9 rocket since its explosion in September 2016. The Falcon 9 is a family of two-stage-to-orbit launch vehicles designed and manufactured by SpaceX. The interstage, which connects the upper and lower stages for Falcon 9, is a composite structure with an aluminum honeycomb core and carbon fiber face sheets.

Down the road, SpaceX plans to reuse the rockets to slash costs and reduce pricing.