"The spectroscopic results showed way more exotic, heavy water than would be expected for a comet from our own solar system, according to research published yesterday in Nature Astronomy."
"The ratio acts as a thermometer for the formation environment of planetary systems, says Luis Salazar Manzano, a doctoral student at the University of Michigan and lead author of the Nature Astronomy study."
"Whether water in a rocky body contains deuterium depends on the chemical processes that formed it. Specifically, cold temperatures greatly favor reactions that pump up the amount of heavy water relative to everyday water."
Comet 3I/ATLAS, an interstellar object, is fading from view as it leaves the solar system. Observations using ALMA in Chile revealed an unexpected high ratio of heavy water, indicating a different formation environment. Heavy water's presence suggests that cold temperatures influenced its chemical processes. This finding provides insights into the thermal history of planetary systems and highlights the uniqueness of our solar system compared to others. The study emphasizes the importance of heavy water ratios as indicators of a comet's origins.
Read at www.scientificamerican.com
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