Comet Lemmon will have its closest brush with Earth on or around Tuesday, Oct. 21. Comet SWAN should have its flyby with ...

ALMA captures surprising activity in comet C/2014 UN271, Bernardinelli-Bernstein comet, the largest ever detected.

The building blocks of life may be much more common than we previously thought. Observations of a comet coming from outside ...

NASA’s Swift telescope spotted signs of water on interstellar comet 3I/ATLAS - proof that water flows far beyond our solar ...

Two bright green comets are streaming through the skies and are visible to skygazers in the Northern Hemisphere.

Analyses of its emissions using NASA’s Neil Gehrels Swift Observatory indicate that the interstellar comet probably has a very different structure than comets in the solar system.

Telescopes trained on the interstellar comet 3I/ATLAS have revealed that it looks much like comets found in the outer reaches of our own solar system. However, puzzling features, such as a ...

The stunning comet C/2024 G3 lights up the sunset sky over Chile's Very Large Telescope in this spectacular photo. A brilliant comet lights up the night sky over Chile's Atacama Desert in this ...

Comet Lemmon should be visible to the naked eye as it approaches the sun this month. Here are the best locations around Ohio ...

On July 1, 2025, the Deep Random Survey remote telescope in Chile, part of the ATLAS (Asteroid Terrestrial-impact Last Alert System) project, spotted a new comet. But it wasn't just any old comet: ...

NASA's EPOXI mission comes within 450 miles of Comet Hartley 2. Nov. 4, 2010 — -- Thirteen million miles out in space, a NASA probe called Deep Impact has flown within 435 miles of Comet Hartley ...