SpaceX Unveils Heavy-Lift Vehicle Plan

By Guy Norris

NASHVILLE, Tenn. — The U.S. government should lead development of a nuclear thermal propulsion system for a future Mars mission and leave new heavy-lift launchers to commercial entities, Space Exploration Technologies (SpaceX) says.

Unveiling conceptual plans for a family of Falcon X and XX future heavy-lift vehicles at last week’s AIAA Joint ...

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