Orbion's Aurora electric thruster hot fire. Credit: Orbion Space

WASHINGTON — Orbion, an independent small-satellite propulsion company based in Michigan, has delivered 33 electric propulsion units to York Space Systems for a U.S. military satellite constellation, the company said, marking the first time York has publicly identified Orbion as a propulsion supplier.

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Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...