Scientists may have just uncovered 10,000 more possible planets lurking beyond our solar system. A new study published by ...

"Rather than 'icy' or 'rocky,' we should simply call them minor giants." ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

Earth's Composition Closely Matches Mars, Suggests New Study On Planet's Origins ...

As it crossed our Solar System, the interstellar object 3I/ATLAS released up to the equivalent of 70 Olympic swimming pools ...

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal interstellar body ...

When you think of outer space, you're likely picturing stars, planets and moons. But much of space is filled with clouds of gas, plasma and stardust—known as interstellar clouds.

The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...