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

I/ATLAS was first spotted by NASA scientists in May this year. Ever since, it has displayed behaviors that are not just ...

The interstellar object 3I/ATLAS has astonished astronomers by turning distinctly blue and rapidly brightening as it neared ...

Modern astronomy is giving us unprecedented views of the asteroids, comets, and other small bodies that litter our cosmic ...

The recent identification and reports of the comet 3I/ATLAS has sparked widespread interest among astronomers, space agencies ...

Astronomers have identified a small but significant possibility that a Neptune-sized planet is quietly orbiting within the ...

The interstellar comet 3I/ATLAS has just made its closest pass to the Sun, and it's brighter than scientists expected.

While 3I/ATLAS is getting all the attention, there are a number of other comets visible through telescopes and binoculars in ...

There are a few ways you could define the edge of the Solar System – for instance, where the planets end, or at the Oort cloud ... distance to Pluto before being impeded by the interstellar medium," ...

As 3I/ATLAS nears the Sun, scientists debate whether it’s a natural comet or something artificial. Follow its journey and the ...

Perihelion for 3I/ATLAS takes place on Oct. 30, when the interstellar interloper will be 1.35 astronomical units (125 million ...