3I/Atlas is estimated to be more than twice as old as our solar system, from isotropic measurements
r/space focuses on measurements and estimated, with context pulled from source reporting instead of recycled feed copy. Cross-checked against New Scientist and Wired.
US
Tuesday, 10 March 2026·Source: r/space·US·corporate
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What happened: Interstellar objects provide the only directly observable samples of icy planetesimals formed around other stars, and can therefore provide insight into the diversity of physical and... Here we report isotopic measurements of the interstellar comet 3I/ATLAS, which reveal an elemental composition unlike any Solar...
Cross-source context: New Scientist highlights the levels of a heavy form of hydrogen in 3I/ATLAS are 30 to 40 times higher than in Earth's oceans, suggesting the comet has a cold... Wired highlights analysis of the tail of 3I/Atlas reveals that it contains an anomalous proportion of methanol, a class of alcohol used in fuels.
What to watch next: movement around measurements, estimated.
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Original Source Text
Verbatim descriptions from source feeds — unedited, as received
r/space(lean-left)
"When interpreted with respect to models for Galactic chemical evolution, the carbon isotopic composition implies that 3I/ATLAS accreted roughly 10-12 billion years ago, following an early period of intense star formation. 3I/ATLAS thus represents a preserved fragment of an ancient planetary system,
The levels of a heavy form of hydrogen in 3I/ATLAS are 30 to 40 times higher than in Earth's oceans, suggesting the comet has a cold and distant origin
Interstellar objects provide the only directly observable samples of icy planetesimals formed around other stars, and can therefore provide insight into the diversity of physical and... Here we report isotopic measurements of the interstellar comet 3I/ATLAS, which reveal an elemental composition unlike any Solar...
The levels of a heavy form of hydrogen in 3I/ATLAS are 30 to 40 times higher than in Earth's oceans, suggesting the comet has a cold and distant origin
The levels of a heavy form of hydrogen in 3I/ATLAS are 30 to 40 times higher than in Earth's oceans, suggesting the comet has a cold and distant origin