Critical analysis of NASA Orion heat shield safety concerns for the upcoming Artemis II mission.
On March 30, 2026, NASA will attempt to send four astronauts around the moon on Artemis II. The trouble is that the heat shield on Orion blows chunks — literally. When Artemis I flew in 2022, large pieces of material blew out of Orion's heat shield during re-entry, leaving divots. Large bolts embedded in the heat shield also partially eroded and melted through.
— Jeremy VanderKam, deputy manager for Orion's heat shield
Three lethal problems identified by NASA OIG:
- Heat shield spalling: Deep gouges and holes in Avcoat blocks that can lead to burnthrough
- Impact from heat shield fragments: Pieces can strike the parachute compartment
- Bolt erosion: Three of four separation bolts melted through, potentially exposing vehicle to hot gas ingestion
NASA initially covered up the problem, declining to publish the post-flight assessment review. The agency then convened an independent review panel in April 2024, but its findings were not made public. NASA announced in December 2024 it found a root cause but said changing the re-entry trajectory would be "more than adequate."
Heat shield expert and Shuttle astronaut Charles Camarda argues NASA is demonstrating the same dysfunction that led to Columbia and Challenger — building "toy models" to support the conclusion it wants to reach rather than grounded physics.
Most frustrating: NASA added an Artemis III to the manifest in early 2026, pushing the first moon landing to Artemis IV. This removes any rationale for flying astronauts on Artemis II — if there are issues with Orion, it's safer to encounter them in Earth orbit than on a long trip around the Moon.