Scientists trace 11 billion year old comet’s home to a mystery cold corner of the Milky Way
This celestial wanderer is only the third confirmed interstellar visitor and potentially the oldest
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This celestial wanderer is only the third confirmed interstellar visitor and potentially the oldest
By Ashley Strickland, CNN (CNN) — Astronomers using radio telescope observations to get an inside look at an interstellar comet have gleaned new insights into when and where the ce...
By Ashley Strickland, CNN (CNN) — Astronomers using radio telescope observations to get an inside look at an interstellar comet have gleaned new insights into when and where the ce...
Interstellar comet 3I/ATLAS is now on its way out of our solar system, never to return. The comet was only the third-ever detected object to originate from outside our solar system...
A new analysis of data obtained by JWST on 3I/ATLAS as it was on its way out of the Solar System (in December 2025) showed that its interior is rich in methane ice.
Interstellar comet 3I/ATLAS was almost called 3I/Rubin, after researchers found that the giant survey telescope coincidentally spotted this visitor from the stars over a week befor...
A comet from beyond our solar system is giving astronomers a rare look at how alien planetary systems may form under conditions very different from those that shaped our own cosmic...
The most recent interstellar visitor was crisscrossing our galaxy for some 10 to 12 billion years before it came near the Sun. The post Interstellar Comet 3I/ATLAS Has Cold, Ancien...
Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically different from anything known to have ever formed around our...
AL DUQM: The Omani Society for Astronomy and Space was able to observe and photograph the comet 'C/2025 R3 “PanSTARS' in the sky of the Sultanate of Oman, as part of its ongoing ef...
Міжзоряна комета 3I/Atlas імовірно зародилася в холодному куточку Чумацького шляху - учені<p>Комета 3I/Atlas виявилася вдвічі старшою за Сонце та містить аномальну кількість...
"Each interstellar comet brings a little bit of its history, its fossils, from elsewhere."
Learn more about the interstellar traveler, Comet 3I/ATLAS, and what researchers know about its place of origin.
The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.
The comet that rambled past us from another star last year likely originated in a cold, isolated corner of the galaxy that had yet to gel into its own solar system, astronomers rep...
The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) instruments aboard ESA's Jupiter Icy Moons Explorer (Juice) spacecraft and NASA's Europa Clipper made unique obs...
The National Oceanic and Atmospheric Administration's space weather satellite just caught Comet C/2025 R3 streaking by the sun.
If we're lucky, we'll soon have bright comets at both dawn and dusk. The post Dawn Comet C/2025 R3 (PanSTARRS) May Hold a Surprise appeared first on Sky & Telescope.
A new comet has arrived in our southern skies, but an astronomer warns the full moon might make it a "faint visitor" for now.
It's from a corner of the galaxy far lonelier than ours. ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe...
At the centre of a water molecule, tucked inside its hydrogen atom, there is usually just a single proton. Nothing else. But in a small fraction of the water on Earth, and in comet...
Their observations suggest that the comet’s chemistry changed as it passed near the Sun, providing new clues to how material in interstellar comets differs from that in come...
The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) instruments aboard ESA’s Jupiter Icy Moons Explorer (Juice) spacecraft and NASA’s Europa Clipper made unique obs...
The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came from somewhere colder and with lower levels of radiation t...
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