A newly discovered comet has astronomers excited, with the potential to be a spectacular sight in early April. C/2026 A1 ...

SPHEREx tracked the interstellar comet as it grew considerably brighter after perihelion.

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

NASA’s TESS tracked the interstellar comet during a special observation period from January 15 to 22, 2026.

The breakup was caused by the extreme conditions near the Sun; during its latest approach, C/2025 K1 flew as close as 0.334 ...

Image of the comet 3I/ATLAS capture by the European Space Agency's ExoMars Trace Gas Orbiter. The streaks are stars and the dot is the comet. An interstellar visitor is zipping through the Milky Way, ...

This comet could be part of the Kreutz family and is expected to flare dramatically as it sweeps past the Sun.

ESA’s Mars orbiters have observed comet 3I/ATLAS, only the third interstellar comet ever discovered. The faint, distant object revealed a glowing coma as it was heated by the Sun. Researchers are ...

Over the past 2,000 years, a series of spectacular comets have graced our skies. Without fanfare, they appear seemingly from ...

A rare, green-glowing comet will make its closest approach to Earth next week — and it won’t return for more than a thousand years. Comet C/2025 A6 (Lemmon), described by National Geographic as “this ...

This is great news for planetary defense. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The path of comet 3I/ATLAS through the solar system has ...

NGC 7331, the sight of supernova SN2025rbs, imaged by George Gheirchi (US).