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.
3I/ATLAS is heading away from the sun on an escape trajectory from our solar system.
In late April 2026, a long-period comet will swing through the inner solar system. It will likely be visible with binoculars, and there's a small chance it could be seen with the naked eye.
3I/ATLAS may have moved away from Earth as it makes its way out of the solar system, but this interstellar intruder continues to delight and surprise astronomers.
Highlights from a cometary trio that captured our imaginations.
