We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.
This is a fiction/fan codex: entries describe an in-universe canon. Our audits check canon and internal consistency — external fact-checking does not apply the way it does on real-subject codexes.
Last full accuracy audit: 2026-08-22 · 19 entries checked · 6 flagged · 18 issues confirmed · 6 corrected · 12 still open
NASA — Rocky is not a NASA personnel; Rocky is an alien from Erid, not a human working for NASA.
NASA — Dr. Teufel and Dr. Kowalski are not canon characters in Project Hail Mary; the key NASA scientists are Dr. Lokken, Dr. Dubois, and Dr. Lamai.
Canadian Space Agency — Artemis II is not the first flight of the Space Launch System or Orion overall; Artemis I was the first uncrewed flight of both.
Canadian Space Agency — The 'State of NASA' address was not a separate event given at NASA Headquarters on the same day as the crew announcement at Ellington Field; the address occurred earlier that day at NASA Headquarters, and the crew announcement at Ellington Field was a separate
Sol System — The entry states the 'Nishimura event' was a sudden dimming observed at a distant star, but in the canon, the dimming was first observed at a star named 'Nishimura', and the discovery of Astrophage was made by analyzing data from that star, not from a 'Nishimu
Sol System — The entry claims the Hail Mary mission was launched from Earth to Tau Ceti, but in the canon, the Hail Mary was launched from Earth orbit, not directly from Earth's surface.
Tau Ceti System — Grace sends his video logs and taumoeba samples to Earth via the probes before deciding to rescue Rocky. In canon, he rescues Rocky first, then sends the probes.
Sol Re-entry — The Hail Mary spacecraft does not return to Earth's atmosphere; it lands on Earth, but the entry and landing are not described in the book as a 'Sol Re-entry' phase.
Sol Re-entry — Rocky does not remain on board to assist with navigation during the return to Earth; Rocky stays in the Hail Mary while Grace takes the Blip-A to deliver the Astrophage solution to the sun, and Rocky does not accompany Grace to Earth's surface.
The Hail Mary — The entry states that the coma-inducing drug caused memory loss 'upon arrival at Tau Ceti,' but the memory loss occurred upon waking from cryosleep, not specifically tied to arrival.
The Hail Mary — The entry claims that 'Rocky had not boarded the Hail Mary earlier,' but Rocky never boarded the Hail Mary at all; Grace flew to Rocky's ship.
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