3I/ATLAS Has An Extreme Taste For Heavy Water
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5 Articles
Universe Today
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More and more details about 3I/ATLAS are filtering through the scientific process as time goes on. Our third known interstellar visitor attracted the attention of some of the most powerful observatories in the world when it was discovered in July 2025, and some of those telescopes found something peculiar - the isotopes it contained appeared different. A new paper submitted to The Astrophysical Journal Letters (and available in pre-print on arXi…
Isotope puzzles in interstellar comets: The water of 3I/ATLAS contains unusually much deuterium. Astrochemical models now show that this extreme value can be produced particularly well in a dense, metal-poor molecular cloud. Thus, the high deuterium content in the water provides a second indication of a genesis environment that differed significantly from that of the solar system. Wako (Japan). 3I/ATLAS carries [...] The article Deuterium-rich w…
The interstellar object 3I/ATLAS, discovered in July 2025, revealed unusual isotopic characteristics that intrigue scientists. Researchers at RIKEN Pioneering Research Institute, Japan, published a study that analyzes the composition of...
The study of comets and asteroids is precious to astronomers, because these objects constitute "building waste" dating from the formation of a planetary system. Indeed, when a star is born, part of the matter gathers around it into a vast disk of dust and gas. It is the protoplanetary disk. Over time, these dusts aggregate to form grains, then stones and blocks, until they form planets. "But all this matter does not participate in the formation …
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