SpaceX Unveils Ambitious Exploration Goals

By Guy Norris
Los Angeles

While NASA deliberates over its heavy-lift launch options, Space Exploration Technologies Corp. is revealing ambitious concepts for a family of Falcon X and XX super-heavy-lift vehicles that it says could provide the foundation for the first commercially based road map to Mars.

For the transition from Earth to Mars, however, SpaceX believes nuclear thermal is the preferred propulsion ...

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