3I/ATLAS: Extreme Deuterium Enrichment Reveals Cold, Metal-Poor Disk Formation at the Milky Way’s Dawn—A 12-Billion-Year-Old Visitor Sparking a Technosignature Debate
To the point
3I/ATLAS is an interstellar traveler whose unusually high deuterium content in water and methane points to formation in an ultra-cold, metal-poor region of the early Milky Way and could make it a roughly 12-billion-year-old relic, though Avi Loeb has suggested it might be a technosignature while most scientists favor natural explanations.
