Observations of the fast-moving interstellar comet with the Very Large Telescope in Chile support similar observations made ...

While 3I/ATLAS is definitely a comet, its composition and age have remained unclear. Now, astronomers have solved these ...

Last year, an interstellar traveler entered our solar system. Some speculated that it was an alien spacecraft, but it turned ...

Astronomers have used the European Southern Observatory's Very Large Telescope (ESO's VLT) to study the composition of ...

During last year’s brief visit from the comet 3I/ATLAS, astronomers got an extremely rare glimpse into the cosmos beyond our ...

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar System and is unlike anything ever before seen in our cosmic backyard, ...

(International Gemini Observatory/NOIRLab/NSF/AURA/Shadow the Scientist; Image Processing: J. Miller & M. Rodriguez ...

Interstellar comet 3I/ATLAS carries isotopic ratios entirely outside the Solar System range, ESO’s Very Large Telescope has ...

Astronomers first spotted Comet 3I/ATLAS in June 2025, and it was later confirmed as an interstellar visitor that originated from outside our solar system. As the comet’s name indicates, it is the ...

WASHINGTON, June 22 (Reuters) - Scientists studying the comet 3I/ATLAS have determined that this interstellar visitor is remarkably ancient – formed an estimated 10 to 12 billion years ago in a ...

Using carbon isotopes in the comet to estimate its age, the authors believe it may be even more ancient than earlier estimates had suggested—as old as 12 billion years. That’s far older than our own ...

One year ago, on July 1 2025, astronomers discovered a fascinating new object moving through the Solar System. Detected by the Asteroid Terrestrial-impact Last Alert System (ATLAS), the object was ...