SLS cubesats
A NASA image shows 9 of the 13 cubesats originally planned to fly on the Artemis 1 mission installed in their payload adapters. At least one cubesat will not be ready in time for the mission. Credit: NASA/Cory Huston

COLORADO SPRINGS — While most of the cubesats manifested to launch as secondary payloads on the first Space Launch System mission have arrived, at least one of them will miss its flight.

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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...