Primary source for all exoplanet data. The NASA Exoplanet Archive is the authoritative database for confirmed worlds, habitability parameters, discovery missions, and atmospheric data. All planet entries on this site are cross-referenced against this archive.

Source for European exoplanet confirmation data including HARPS spectrograph findings, the Pale Red Dot campaign (Proxima Centauri b), and collaborative mission data with NASA on atmospheric characterization targets.

The U.S. government official UAP investigation body. Source for all UAP case classification levels, the 2,400+ active caseload figure, the 21 true anomalies designation, and Director Dr. Jon Kosloski public statements. Annual reports are cited directly.

Source for all data regarding the 12 missing and deceased scientists under federal review. Congressional hearing transcripts, official inquiry letters, and committee records form the evidentiary backbone of every scientist case file on this site.

Source for all historical UAP case files including Project Blue Book (12,618 cases, 1952-1969), Project Mogul documentation, the Roswell declassification records, and all partially released UAP-related government files cited on this site.

Source for the K2-18b biosignature findings, including the University of Cambridge-led team 2025 detection of dimethyl sulfide (DMS) in the planet atmosphere. All atmospheric data is sourced from peer-reviewed publications and official NASA JWST mission reporting.

Every claim on this site must be traceable to at least one Tier-1 source (government record, peer-reviewed publication, or declassified document) or corroborated by two or more independent Tier-2 journalistic sources. Single-source claims that cannot be independently verified are not published.

Unknown Signal does not speculate about causation, motive, or extraterrestrial origin. Particularly regarding the missing and deceased scientists, no causal link between cases has been established by authorities, and this site does not imply one. We present the documented facts and let the record speak.

Classification labels (OPEN, RESTRICTED, CLASSIFIED) on UAP and scientist case files reflect official government designations where documented, or the editorial assessment of information availability based on public record. They are not claims of insider access.

Case files are updated when new verified information becomes available from the sources listed above. The LAST UPDATED date in the navigation reflects the most recent content revision. Outdated or superseded information is corrected rather than removed, maintaining a transparent record of how events developed.

The Command Crew on the About page, the Unknown Signal agency framing, and the classified-file aesthetic are entirely fictional and created for immersive presentation purposes only. All underlying data including planets, UAP cases, and scientist profiles is real, sourced, and cited. The fiction is the wrapper, not the content.

If you identify an inaccuracy, outdated information, or have verified data to contribute, transmit a message via the Contact page. Corrections from credible sources are reviewed and applied promptly. Unknown Signal is committed to maintaining the highest possible accuracy across all case files.