Standing over 320 feet tall, it dwarfs the SpaceX's 230-foot Falcon 9 rocket, featuring a 23-foot diameter payload fairing designed to handle massive payloads — twice the volume of typical commercial rockets in its class.

Doing that on a maiden flight would be unprecedented: that kind of partial reusability was pioneered by SpaceX, Elon Musk’s rocket firm, and it required several attempts before eventually sticking the landing in 2016.