"The observations showed that the ratio of heavy water in the comet is 30 times higher than any regular comet that originated here in our own solar system, and forty times higher than the water found in the Earth's oceans."
"What the preponderance of heavy water suggests is that 3I/ATLAS formed in a cold and remote region of the Milky Way with less radiation, where there were fewer neighboring stars near its home star system."
3I/ATLAS is an interstellar object believed to be a comet that originated from a cold, isolated region of the Milky Way. Observations using the ALMA observatory revealed it vented large amounts of water vapor, containing high levels of deuterium, indicating a unique composition. The heavy water ratio in 3I/ATLAS is significantly higher than that of typical comets and Earth's oceans. This suggests it formed in a less radiated area with fewer neighboring stars, and it is estimated to be over seven billion years old, predating our Sun.
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