SpaceX will launch Starship for a seventh test flight on Thursday, after weather concerns pushed back an experiment that will feature the spacecraft’s first payload deployment test, in what may be the latest milestone for the Elon Musk-owned aerospace company as it develops reusable rockets.

SpaceX’s colossal Starship rocket blasted off Thursday on its most complex test flight yet, with Elon Musk looking to repeat a booster capture with giant mechanical arms and adding a new twist. The 400-foot (123-meter) rocket soared from the southern tip of Texas, heading out over the Gulf of Mexico in late afternoon.