Our solar system is currently passing through the Local Interstellar Cloud, a region of highly diluted gas and dust between ...

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

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

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

Astronomers analyzed the vapors coming off the comet when it neared the sun and found it had a lot of "heavy" water. That hints it grew up in a frigid planetary system, possibly before its home star f ...

The probe launched almost 50 years ago and is the farthest human-made object from Earth. Shutting down one of its scientific devices will help it conserve energy and continue traveling toward the edge ...

The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.

Steven Spielberg says he became 'fascinated' with directing Interstellar but Christopher Nolan ultimately made the better movie.

Christopher Nolan has worked in science fiction for much of his career, but 2014's "Interstellar" is his most conventionally ...