Mysterious Interstellar Object 3I/ATLAS Defies Comet Explanations with Stable Twin Jets

The interstellar object 3I/ATLAS is drawing attention for its unusual behaviour. It emits twin jets that create straight, stable plumes stretching millions of kilometres. These features challenge traditional explanations for comets. Observations show that 3I/ATLAS releases tightly collimated jets of gas and dust. These jets remain geometrically stable over time and do not smear despite the object’s rotation. Data from multiple observatories confirm this pattern as the object approaches the Sun.

Spectroscopic analysis of its coma reveals a composition dominated by carbon dioxide. Water, carbon monoxide, water ice grains, and dust are also present. The James Webb Space Telescope measured a CO2-to-H2O ratio of roughly 8.0, one of the highest recorded in a comet. Earlier near-infrared and optical studies had already detected abundant water ice in the coma.

Polarimetric data collected before perihelion suggests 3I/ATLAS may belong to a new class of interstellar comets. Harvard astrophysicist Avi Loeb notes that the stable jet alignment and lack of smearing are hard to explain with a purely natural origin. Critics of the natural-comet theory argue that the observed mass ejections require more energy than solar radiation alone can provide. The object’s stable, long-range jets and unusual chemical makeup set it apart from known comets. These characteristics raise questions about its origins and nature. Further study is needed to understand the mechanisms behind its behaviour.