The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its ...

Astronomers analyzed the vapors coming off the comet when it neared the sun and found it had a lot of "heavy" water. That ...

Having survived its closest pass to the sun during perihelion on April 19, Comet PanSTARRS is now en route to its nearest ...

Comet C/2025 R3 (PanSTARRS) is brightening in the night sky in April. Here's when and how to see the buzzworthy celestial ...

NASA STEREO-A satellite's SECCHI/HI-2 camera captured this imagery of Comet C/2021 A1 (Leonard) Credit: Space.com | footage ...

Learn more about the interstellar traveler, Comet 3I/ATLAS, and what researchers know about its place of origin.

A new comet should be visible to the naked eye this week, but you're going to need to set an alarm to see it.

A new study suggests that the comet that rambled past us from another star last year likely originated in a cold, isolated ...

A comet named 3I/ATLAS was first discovered on July 1, 2025, and is located about 420 million miles away from Earth, ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

Comet C/2025 R3 (PanSTARRS) is brightening in the night sky in April. Here's when and how to spot the celestial show in ...