3I/ATLAS Anomaly Catalogue: What the Third Interstellar Visitor Is Showing Us

By Marcus Halloway · Published May 13, 2026 · Updated May 13, 2026 Last reviewed: May 13, 2026. 3I/ATLAS is the third confirmed interstellar object to cross our solar system. It arrived hot, behaved oddly at perihelion on October 29, 2025, and as of this writing it is fading back toward the dark. What it […]