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

After months of unprecedented observations, astronomers are bidding goodbye to the beloved comet 3I/ATLAS. First spotted in July 2025, the frigid, dusty space rock is only the thi ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the ...

NASA's infrared telescope SPHEREx captured stunning images of interstellar comet 3I/ATLAS as it exited the solar system.

Interstellar comets are the original cosmic explorers, and by studying their metallic whispers, we are learning the secrets ...

New infrared observations reveal that the rare interstellar visitor known as comet 3I/ATLAS has dramatically brightened ...

First its rotation slowed between March and May 2017, taking 46 hours to complete a spin where it had once taken only 20 hours. This occurred as the comet neared its closest point to the sun, roughly ...

Comet C/2025 K1 (ATLAS) fragmented after its October 2025 solar approach, with telescope observations documenting multiple ...

Researchers from Auburn University have discovered hydroxyl gas coming from the interstellar comet 3I/ATLAS, a clear chemical sign of water. The Swift Observatory also detected a faint ultraviolet ...

A fresh analysis of Comet 41P/Tuttle-Giacobini-Kresák observations suggests it abruptly reversed its spin after its last ...

Comets are pristine remnants left over from the solar system's formation 4.6 billion years ago, rather than younger fragments created by collisions between larger bodies, a new study suggests. The ...

A new comet was recently discovered that will be making an extremely close flyby of the Sun, which if it survives could make it visible during the day.