The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) instruments aboard ESA's Jupiter Icy Moons Explorer ...

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

The second wave of observations, conducted since December 2025, have allowed scientists to better characterize the chemical ...

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

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 sun ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

A comet named 3I/ATLAS was first discovered on July 1, 2025, and is located about 420 million miles away from Earth, according to NASA. Thankfully, the comet poses no threat to Earth.

An interstellar comet first spotted passing through our solar system in July is beginning its departure from our corner of the universe — but first it will fly by Earth, and scientists are capturing ...

An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about planetary systems ...