Halcyon Avant
Benchmark Space Systems' Halcyon Avant green bipropellant thrusters recently completed testing and have been installed on a Spaceflight Sherpa tug for launch in January. Credit: Benchmark Space Systems

WASHINGTON — The first set of green bipropellant thrusters developed by in-space propulsion company Benchmark Space Systems has been installed on a Sherpa tug by Spaceflight for launch in January.

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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...