SpaceX delayed its seventh test launch of Starship by 24 hours on Wednesday due to weather concerns, pushing 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 mission control lost contact with the newly upgraded Starship, carrying its first test payload of mock satellites but no crew, eight minutes after liftoff.