On Feb. 26, 2025, NASA launched Lunar Trailblazer from Kennedy Space Center to map water on the Moon. About a day after liftoff mission managers lost contact with the $72 million spacecraft, and it was never heard from again.
A NASA review panel, in a report obtained via a Freedom of Information Act request, concluded the primary cause was a software error that pointed the probe’s solar panels 180 degrees away from the Sun. The panel also identified numerous erroneous onboard fault-management actions that, taken together with the pointing mistake, produced the mission-ending failure.
Lockheed Martin built the low-cost spacecraft. The review says the company did not adequately test the solar-panel-pointing software prior to launch. According to the panel, while ground teams might have been able to correct the panel orientation, other software faults complicated recovery efforts and ultimately made restoration impossible.
Timothy Cook, an associate professor at the University of Massachusetts Lowell who previously managed another mission that failed because of a solar-panel pointing problem, noted that complex systems usually fail for multiple reasons. He said such problems can cascade into an irrecoverable state.
Neither NASA nor Lockheed Martin provided spokespeople for the reporting, but both issued statements saying they learned from the loss. NASA described the setback as offering powerful lessons for future lower-cost missions. Lockheed Martin said it is strengthening fault-management architecture, flight software implementation, and pre-launch testing while continuing to balance risk acceptance for faster, lower-funded programs.
Scott Hubbard, a longtime NASA veteran now at Stanford, observed that Class D missions accept higher risk but that risk must be understood and mitigated. He cautioned that accepting lower cost does not mean failure is acceptable, noting that cheap failure is no good for anybody.
The loss was particularly painful for the science team. Bethany Ehlmann, the project principal investigator at launch, called the outcome gutting and thanked the community for recovery efforts. She said the review highlights the need to align institutional goals, contracting, and technical approaches to ensure mission success, and she welcomed NASA sharing the findings so other programs can learn.
NASA applied extra scrutiny to Escapade, a Class D pair of Mars probes led by UC Berkeley’s Robert Lillis, after Trailblazer’s failure. That scrutiny helped when an early post-launch silence for Escapade turned out to be a small ground-antenna pointing error; teams restored contact about six hours after launch and the spacecraft began operating. Escapade will not reach Mars until the following September, and Lillis said it will take time to know whether lessons from Trailblazer have been fully absorbed.