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

Research findings are available online in the journal Nature Astronomy. The original story “ Interstellar Comet 3I/ATLAS ...

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

Astronomers have conducted the first isotopic analysis of an interstellar comet, 3I/ATLAS, revealing it formed in an extremely cold, remote part of the Milky Way. The comet’s water contains deuterium ...

Comet C/2025 R3 (PanSTARRS) is making its closest approach to Earth on April 26, just a week after surviving an intense pass near the Sun. The comet is visible to the naked eye under dark southern ...

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

"Each interstellar comet brings a little bit of its history, its fossils, from elsewhere." ...

STARRS, also known as comet C/2025 R3 (Pan-STARRS), is now visible before sunrise. Here’s how, when and where to see it on ...

3I/ATLAS is now sailing away from Earth and our solar system itself, but astronomers have already learned a wealth of ...

Comet C/2025 R3 is putting on its final show as it passes close to the Sun before leaving the solar system forever.

The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came ...

STARRS, also known as comet C/2025 R3 (Pan-STARRS), just got closest to the sun and should still be visible from the Northern ...