The interstellar comet 3I/ATLAS is unusually rich in alcohol — a chemical clue that could reveal how planets and icy bodies form around other stars.
…

A newly discovered comet is rapidly brightening and could become visible from Earth — if it survives an extreme close encounter with the sun on April 4.
…

By taking advantage of a maneuver that would see a spacecraft fire rocket engines while in the solar corona, that spacecraft’s velocity could receive a huge boost — enough to allow it to catch up with 3I/ATLAS, which is th…

The fate of a comet that was predicted to pass close to Earth remains a mystery five years after its dramatic breakup in the inner solar system.
…

Interstellar comets are the original cosmic explorers, and by studying their metallic whispers, we are learning the secrets of worlds we may never see directly.
…

New infrared observations reveal that the rare interstellar visitor known as comet 3I/ATLAS has dramatically brightened during its farewell tour of the solar system.
…

A new comet approaching the sun has caught the attention of astronomers, primarily because of its lineage. It appears to belong to a group of comets that in some cases have briefly become outstandingly bright objects.
…

The comet broke into pieces after making a close approach around the sun in October 2025.

The interstellar visitor may still have a few things to tell us before it leaves our solar system.

C/2024 E1 (Wierzchos) brightened significantly ahead of its close approach to the sun.