The interstellar comet 3I/ATLAS has a thick irradiated crust that no longer resembles its home star system, simulations and ...

I/ATLAS is the third interstellar object ever discovered in our solar system. Telescope observations suggest it is a roughly 7-mile-wide (11 kilometers) comet zooming at more than 130,000 mph (210,000 ...

An interstellar comet that originated outside our solar system has just made its closest pass to the sun, brightening ...

Interstellar comet 3I/ATLAS on Wednesday reached its closest point to the Sun, a point known as perihelion. Although this ...

Astronomers are hustling to use interplanetary spacecraft to study the interstellar comet dubbed 3I/ATLAS while the sun is ...

This is only the third interstellar comet scientists have observed. Its extreme brightening, unusual composition, and intense ...

Interstellar comet 3I/ATLAS is briefly out of view as it travels around the sun this week, but researchers and amateur ...

CNN’s Tom Foreman breaks down what we know about the interstellar comet that originated outside our solar system.

An interstellar comet that originated outside our solar system just flew by the sun. Next, the object will fly by Earth in December.

While most scientists believe it’s a natural comet, one Harvard astronomer has suggested its unusual features could hint at ...

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that won’t return until the next millennium. Comet C/2025 A6 (Lemmon), captured ...

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. Hydroxyl compounds ...