UAP — the official term and key reports
UAP stands for unidentified anomalous phenomena — the official term that replaced UFO in U.S. government language. This page tracks AARO reports, NASA's independent study and congressional hearings.
Related files
AARO FY2024: 757 UAP reports, 49 resolved – the official report from the Pentagon
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AARO FY2024 Reports: 757 reports, 49 resolved — what it means
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David Grusch 2023: the UAP whistleblower before Congress
Read the file
NASA UAP September 2023 report: conclusions of 16 scientists
Read the fileFrequently asked questions
What does UAP mean?
UAP stands for unidentified anomalous phenomena. It is the official term adopted by the Pentagon and NASA in place of UFO.
Who investigates UAP?
In the U.S., AARO (a Pentagon office) centralizes reports; NASA ran an independent scientific study published in 2023.