Relativity Space’s Terran R, while similar in performance to the Falcon 9, looks more like SpaceX’s Starship vehicle, from its metallic finish to the aerodynamic design of the upper stage. And, like Starship, both stages of Terran R are intended to be reusable.

Why Relativity Space and Rocket Lab are both developing larger rockets that could vie with Falcon 9 and Vulcan Centaur for some classes of payloads.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...