Enlarge / The Terran 1 rocket as seen on the launch pad at Cape Canaveral. (credit: Relativity Space/Trevor Mahlmann) Relativity Space, the ambitious company that aims to additively manufacture the majority of its rockets, will try again to make the debut launch of its Terran 1 vehicle on Wednesday evening from Florida. The California-based company has a three-hour launch window that opens at 10 pm local time at Cape Canaveral Space Force Station (02:00 UTC on Thursday).