Astrophysicist Josep Trigo-Rodriguez of the Institute of Space Sciences near Barcelona, Spain, believes it is an interstellar ...

On July 2, 1985, the European Space Agency launched the Giotto space probe to get a close-up look at Halley's Comet. Nearly ...

I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...

The European Space Agency (ESA) has detected what could be only the third known object to enter our solar system from ...

An object thought to have come from another star has been seen entering the solar system at high speed, and is expected to ...

The monstrous 85-mile-wide comet C/2014 UN271 is the second most distant body originating from the Oort Cloud found to be ...

Classified as a comet, 3I/Atlas was first spotted on Tuesday by the NASA-funded ATLAS survey in Hawaii. Subsequent analysis ...

Could it be a comet, like 2I/Borisov, a celestial object made of ice, dust, and small rock particles? Or could it be an asteroid, ejected from a distant star system to end up in our own? In any case, ...

On April 13, the comet will pass close to the bright star. The comet is currently at a magnitude of +8, making it too faint to see with the naked eye.

When 76 years have passed, the comet—like Halley’s Comet—reappears. “I’m sorry about last time,” it calls to the star. “Yes, let’s be friends. . . .