Actual paper: https://www.nature.com/articles/s41550-025-02651-2 https://www.nature.com/articles/s41550-025-02651-2 From the abstract: “This is the lowest-mass

Actual paper: https://www.nature.com/articles/s41550-025-02651-2 https://www.nature.com/articles/s41550-025-02651-2 From the abstract: “This is the lowest-mass object known to us, by two orders of magnitude, to be detected at a cosmological distance by its gravitational effect. This work demonstrates the observational feasibility of using gravitational imaging to probe the million-solar-mass regime far beyond our local Universe.”