Northstar's Skylark constellation of space situational awareness satellites will have optical sensors for tracking other satellites across multiple orbits. Credit: Northstar

WASHINGTON — NorthStar Earth & Space, a company planning a satellite constellation to collect space situational awareness (SSA) data, is working with Spire to field an initial fleet of spacecraft.

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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...