Microscopy narrows—but does not solve—two plate anomalies

A new VASCO preprint examines original glass plates, a copy plate, archival metadata, and digitized scans for a nine-feature event photographed on April 12, 1950, and a three-feature event from July 19, 1952. The candidate marks reproduce across the available representations and appear compact, which argues against their having been created solely by the modern digitization process.

That narrower result does not establish that the marks were flashes in the sky. The authors say microscopy still cannot distinguish a brief celestial source from a defect in the photographic emulsion, and no comparable simultaneous plate from a second observatory is available to test parallax. The paper is an unreviewed preprint and does not resolve the wider dispute over VASCO population statistics.

Why it matters

This is the productive middle of anomaly research: eliminate one artifact pathway, keep the remaining explanations open, and state exactly what additional evidence would separate them.

What the source establishes

Confirmed documented microscopy in a current preprint. Scanner artifacts are disfavored for these features; celestial flashes, emulsion defects, and any technosignature interpretation remain unresolved.