Since the dawn of the solar system, rocky visitors from deep space have blazed across Earth’s skies. When will the next asteroid or interstellar object make its pass by our planet?

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.

A team figured out the practical mechanics behind one of sci-fi epic film Interstellar’s most out-there ideas.

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

In November 2025, two spacecraft on opposite sides of an interstellar comet did something no observatory on or near Earth ...

On May 22, 2026, the Pentagon released a second batch of previously classified photos and videos showing what appear to be ...

Interstellar comet 3I/ATLAS was almost called 3I/Rubin, after researchers found that the giant survey telescope ...

The solar system is now at the edge of this cloud, but the massive stockpile of cosmic stardust has left signatures on Earth's southernmost region.

On a single day last November, two spacecraft millions of kilometers apart turned their ultraviolet eyes toward the same ...

NASA’s Europa Clipper and ESA’s JUICE captured opposite sides of interstellar comet 3I/ATLAS at the same time, revealing strange chemistry inside it.

Time as a concept seems so simple in day-to-day life, until you start talking about time travel and all the reasons that it could or could not be possible.