Dr. Beatriz Villarroel is a Swedish astrophysicist and Assistant Professor at Nordita (The Nordic Institute for Theoretical Physics, Stockholm). Her research spans astrophysics, astrobiology, and the scientific fringes of unidentified anomalous phenomena. Villarroel leads the VASCO (Vanishing & Appearing Sources during a Century of Observations) project and for ExoProbe-style investigations.

She has developed statistical methods to compare historical astronomical photographic plates (pre-satellite era) with modern survey data, with the goal of detecting objects that appear, disappear, or flicker in ways not accounted for by conventional astrophysics.

Her work is significant in disclosure-adjacent research because she is among a small set of scientists bringing archival astronomy into the UAP/ETI conversation in a rigorous way. She has published peer-reviewed studies that report “transients”—point-like light sources on photographic plates from the 1940s–1950s that vanish in later epochs. In particular, one study catalogued nine simultaneous transients in April 1950 on a Palomar Observatory plate, all absent in earlier and modern deep images. Another case involved a bright triple transient captured on 19 July 1952 in the First Palomar Sky Survey, with all three objects—~15th magnitude—disappearing entirely within an hour and remaining undetectable decades later despite much deeper exposures.

These findings push discussion into the possibility that something unusual—possibly reflective, non-stellar, non‐atmospheric—might have been orbiting Earth before human satellites. The data are meticulously analysed; causal claims (e.g. extraterrestrial artifacts) are speculative while hypotheses about solar reflections, contamination, or optical artifacts are seriously considered.

The VASCO project compares hundreds of millions of objects from older catalogs (e.g. USNO-B1.0) down to magnitude ~20-21 with modern sky surveys such as Pan-STARRS (magnitude ~23-23.4), identifying thousands of candidate objects that vanish or appear. Some red transient sources appear only in one epoch and may represent rare astrophysical events like stellar flares or supernovae; others resist natural explanations. Villarroel has also worked on searches for high-albedo (very reflective) objects near geosynchronous orbit using pre-satellite plates.

These methods seek to test whether observed transients could be reflective “glints” from flat surfaces, possibly artificial, in orbits predating Sputnik 1.

Her findings have stirred debate. The papers report statistically significant deficits of transients in Earth's shadow during certain epochs—something difficult to explain by instrumental artifacts—suggesting potential solar reflections from orbiting surfaces. Critics have raised possible systematics: plate defects, emulsion issues, scanning artefacts, or contamination. In some instances, repositories like arXiv have declined to host versions of her work, reportedly saying certain studies were “not of interest,” though the same works were accepted in peer-reviewed journals.

Beyond technical results, Villarroel’s work is reshaping how disclosure-related research is conducted. She bridges traditional astronomy with anomalous phenomena, advocating that archival data and rigorous statistical methods can reveal phenomena possibly overlooked due to biases, stigma, or the assumption that anything “before Sputnik” must lack artificial origins. Her projects honor the standard of openness: making data and methods available for independent verification, involving citizen scientists in VASCO, and maintaining care over distinguishing between verified observation, tentative hypothesis, and speculative interpretation.

Dr. Villarroel’s ongoing efforts include the ExoProbe initiative, aiming to search systematically for extraterrestrial artifacts or probes in Earth's vicinity; her collaboration with other astrophysicists in exploring geosynchronous zones for high-reflectivity objects; and deep follow-ups with modern telescopes to check whether archival transients have modern counterparts. Her influence is not just in discovery but in reframing the foundational questions: what evidence counts, how archival records may hold unrecognized phenomena, and how the scientific community engages with topics long relegated to the margins.