Green Run engines
NASA said the Green Run static-fire test Jan. 16 was terminated when the hydraulic system for one of four engines hit a limit intended to be conservative in order to protect the core stage. Credit: NASA

Updated 7:45 p.m. Eastern with details from briefing.

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Jeff Foust writes about space policy, commercial space, and related topics for SpaceNews. He earned a Ph.D. in planetary sciences from the Massachusetts Institute of Technology and a bachelor’s degree with honors in geophysics and planetary science...