New polarimetry data on interstellar comet 3I/ATLAS reveals bizarre refractory dust, proving this alien visitor formed in a ...

Harvard's Avi Loeb says a rare sun alignment on 22 January could prove interstellar visitor 3I/ATLAS is an alien spaceship.

Comet 3I/ATLAS has arrived in the inner solar system behaving as if the usual rules of comet physics were optional. Instead ...

A rare visitor from deep space has swept through the inner solar system, offering astronomers a fleeting look at material forged around another star while also exposing how fragile our early warning ...

Theologians, historians and astronomers have debated the Biblical story for centuries. "The Adoration of the Magi" by Guiseppe Chiari (1654-1727). The Virgin Mary, seated on the left and turned to the ...

An instrument aboard NASA’s Europa Clipper spacecraft captured rare ultraviolet observations of an interstellar comet while Earth-based telescopes were blinded by the Sun. The spacecraft’s unique ...

Is it cropdusting Earth with toxins? When 3I/ATLAS made its fly-by of Earth on December 19, Harvard scientist Avi Loeb wondered if it could’ve delivered an early Xmas present — poison debris raining ...

3I/ATLAS is only the third interstellar object ever observed traveling through the solar system, following 1I/'Oumuamua in 2017 and 2I/Borisov in 2019. Each encounter has sparked fascination—and ...

With 2025 nearly in the books, let’s revisit some of the highlights of the year in space, from astronomy to spaceflight. If you're enjoying this article, consider supporting our award-winning ...

The most sensational story of the year for astronomers has been the discovery of the comet 3I/ATLAS, which was first observed on July 1, 2025 by NASA's Asteroid Terrestrial-impact Last Alert System ...

A rare comet from deep space is passing by Earth today. Comet 3I/ATLAS has reached its closest point to our planet on December 19, 2025. This comet is special because it came from outside our solar ...