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

The astronomer used the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile to make the observations.

The farthest spacecraft from Earth, the Voyager 1 probe, has just shut down another instrument. The reason for this shutdown ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American In an earlier blog post about Christopher ...

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.

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

On October 4, 2025, NASA’s Perseverance rover pointed its cameras away from the Martian rocks it was built to study and ...

An international team of scientists has examined dust grains gathered by the NASA Stardust spacecraft and brought back to Earth – and has discovered that they originated in the interstellar dust ...

The comet is currently in the constellation Pegasus and passing near the Great Square of Pegasus.