The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

Interstellar comet 3I/ATLAS is even more extreme. The ratio of semi-heavy water to regular water is 30 times larger than in ...

Scientists have found unusually high heavy water levels in interstellar comet 3I/ATLAS. The finding suggests it formed in a ...

Astronomers have measured the highest-ever heavy water ratio in an interstellar object, found in comet 3I/ATLAS. ALMA observations reveal its birthplace was far colder and more shielded than our solar ...

The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came ...

The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.

New observations of interstellar comet 3I/ATLAS show high levels of deuterated water, suggesting it formed in a colder star ...

Research findings are available online in the journal Nature Astronomy. The original story “ Interstellar Comet 3I/ATLAS ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Observations of Comet ...

Remember 3I/ATLAS? Yes, the interstellar comet that made plenty of headlines in 2025 is still romping through our solar system. But it may not be around much longer. The otherworldly visitor to ...

Rare interstellar comet 3I/ATLAS is revealing clues about the early Milky Way, offering scientists a glimpse into conditions ...

Interstellar comet 3I/ATLAS showed changing chemistry near the Sun, revealing clues about its internal structure and offering insights into how planets form in distant star systems.