Lawmakers writing NASAs budget want a cheaper upper stage for the...

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2025-07-25 13:00:03

Lawmakers writing NASAs budget want a cheaper upper stage for the SLS rocket

Eliminating the Block 1B upgrade now would save NASA at least $500 million per year. Artist's illustration of the Boeing-developed Exploration Upper Stage, with four hydrogen-fueled RL10 engines. Credit:

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