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

Spacecraft have revealed that the comet—which one scientist suggests could be an alien spacecraft—is now "distinctly bluer ...

Interstellar invader Comet 3I/ATLAS is still full of surprises — an unexpected brightening has scientists baffled ...

Manhattan-sized comet 3I/ATLAS — which scientists suspect could have extraterrestrial origins — will reach its closest ...

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

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 just flew by the sun. Next, the object will fly by Earth in December.

The interstellar comet 3I/ATLAS, the oldest comet ever observed, is currently on a trajectory toward the Sun, sparking global ...

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

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