On Feb. 26, 2025, NASA’s Lunar Trailblazer launched from Kennedy Space Center to map water on the Moon. Mission managers lost contact with the $72 million probe about a day after liftoff, and it was never heard from again.
A review panel convened by NASA, whose report was obtained via a Freedom of Information Act request, concluded the primary cause was a software error that pointed the spacecraft’s solar panels 180 degrees away from the Sun. The panel also found “many erroneous on-board fault management actions” that, together with the pointing mistake, caused the failure.
Lockheed Martin built the low-cost spacecraft. The panel says the company failed to adequately test the solar-panel-pointing software before launch. While mission teams might have been able to correct the pointing issue, other software problems made recovery initially difficult and ultimately impossible.
“When a complicated system fails, it’s usually more than one thing that takes it down,” says Timothy Cook, an associate professor at the University of Massachusetts, Lowell, who previously managed another failed mission with a solar-panel pointing problem. He notes failures often cascade into an unrecoverable outcome.
NASA and Lockheed Martin did not provide spokespeople for this story, but both issued statements saying they learned from the loss. NASA said the setback offers “powerful lessons” for future lower-cost missions. Lockheed Martin said its teams are strengthening fault management architecture, flight software implementation and pre-launch testing while balancing risk acceptance for faster, lower-funded programs.
Scott Hubbard, a NASA veteran now at Stanford, notes that class D (lower-cost) missions accept higher risk, but that risk should be understood and mitigated. “It didn’t mean the whole darn thing wouldn’t work,” he said, adding that “cheap failure is no good for anybody.”
The failure was especially painful for scientists who invested years in the mission. Bethany Ehlmann, the project’s principal investigator at the time of launch, called the loss “gutting” and expressed gratitude for the community’s recovery efforts. She said the review underscores the need to align institutional objectives, contracting and technical approaches to focus on mission success, and she welcomed NASA sharing the findings so other missions can learn.
One such mission is Escapade, a Class D pair of probes to Mars led by UC Berkeley’s Robert Lillis. After Trailblazer’s loss, NASA gave Escapade extra scrutiny before its November launch. That attention paid off when an early post-launch silence was traced to a small ground-antenna pointing error; six hours after launch, teams established contact and the spacecraft began operating.
Escapade won’t reach Mars until the following September, so Lillis said it will take time to know whether lessons from Lunar Trailblazer have been fully absorbed.