Weather forecasters say the conditions should be excellent this evening for Relativity Space’s third attempt at launching the world’s first 3D-printed rocket from Cape Canaveral Space Force Station. Terran 1 is a 110-foot rocket that… if all goes as planned… will become the first launch ever for Relativity and the first launch ever of a 3D printed rocket… during a three-hour launch window that opens at 10 tonight.