Mini

Interstellar Comet: Water 14 Times Heavier Than Earth's ⚡ экспресс

Original: "Isotopic Signature of Organic Molecules from Beyond the Solar System: An Enriched Methane D/H Ratio in the Interstellar Object 3I/ATLAS"
arXiv:2603.20445 · 2026-03-20 · CC BY 4.0 · ⏱ 1 min · Exoplanets Galaxies
The James Webb Telescope found a record amount of deuterium—heavy hydrogen—in the interstellar object 3I/ATLAS.
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The Webb Telescope caught interstellar comet 3I/ATLAS and found its water and methane soaked in deuterium, like from Arctic ice. This isotopic signature is a mark of frosty birth. So, on other worlds, planets can form in far harsher conditions than ours.

🎯 The deuterium abundance points to a comet birth temperature below –250°C — colder than the eternal shadows on the Moon.

🎬 Interstellar wanderers like 3I/ATLAS come to life in the pages of science fiction: for example, in Arthur C. Clarke's novel 'Rendezvous with Rama'.

Scientists
Christian DopplerD. B. McLaughlinDidier QuelozMichel MayorR. A. RossiterAlbert Einstein
Tags
spectroscopy Water hydrogen JWST cosmic dust exoplanet
Laws
Doppler effectgravitational lensingKepler's third lawCoulomb's lawMaxwell's equationsPlanck's law
Original: arXiv:2603.20445 · CC BY 4.0 · bridge42worlds