On Feb. 26, 2025, NASA launched Lunar Trailblazer from Kennedy Space Center on a $72 million mission to map lunar water. Contact with the spacecraft was lost about a day after liftoff and was never reestablished.
A NASA-assembled review panel — whose report NPR obtained via a Freedom of Information Act request — determined the immediate cause was a flight-software error that commanded the probe’s solar arrays to point 180 degrees away from the sun. That mispointing, together with multiple erroneous on-board fault-management reactions, produced a cascade of failures the panel concluded led to loss of the spacecraft.
Lockheed Martin built the low-cost probe. The review found the company did not perform adequate prelaunch testing of the solar-panel pointing software. While some mission team actions might have corrected the initial misalignment, other software faults interfered with recovery efforts and ultimately prevented restoration of contact.
Neither NASA nor Lockheed Martin provided spokespeople for this story, but both issued statements acknowledging the failure and saying they have taken lessons from it. NASA called the loss disappointing but said it contains “powerful lessons” for future low-cost missions. Lockheed Martin emphasized that lower-budget programs carry higher inherent risk and said it is strengthening fault-management architecture, improving flight-software implementation and expanding prelaunch testing while still weighing acceptable risk for faster, lower-cost development.
Experts and past mission leaders said the loss fits a familiar pattern: complex missions more often fail from chains of interacting problems than from a single isolated fault. Timothy Cook, an associate professor at the University of Massachusetts Lowell who oversaw a 1999 mission that also experienced a solar-panel pointing issue, noted that systems failures frequently cascade until recovery becomes impossible.
Scott Hubbard, a longtime NASA veteran now at Stanford, pointed out that NASA deliberately accepts greater risk for class D (lower-cost) missions, but warned that accepting risk should not mean the mission is likely to fail. “Cheap failure is no good for anybody,” he said.
Bethany Ehlmann, Lunar Trailblazer’s principal investigator, described the loss as devastating to a team that spent years preparing the mission. She thanked colleagues who assisted in recovery attempts and said the review highlights the need for tight alignment among institutional goals, contracting strategies and technical practices. She welcomed NASA sharing the report so other missions can learn from the mistakes.
The report also affected other class D projects. Robert Lillis, principal investigator for Escapade — a pair of low-cost spacecraft bound for Mars to study solar-wind interactions — said Trailblazer’s loss prompted extra scrutiny before Escapade’s November launch. For several hours after liftoff the team heard nothing and feared a repeat; the silence turned out to be due to ground antennas being pointed slightly wrong. Once corrected, contact was made roughly six hours after launch.
The panel’s findings underscore the trade-offs of lower-cost missions: they can deliver valuable science affordably, but constrained testing, fault management and software development raise the chance of unrecoverable errors. The review’s recommendations and the agencies’ commitments to improve prelaunch testing, fault management and software practices aim to reduce those risks for future missions.