Some of the most common planets in our galaxy may be hiding far more water than scientists can currently detect—even with the ...

In a clip from the BBC’s Wonders of the Solar System, Brian Cox visits an ‘alien’ within a cave that’s a death trap for ...

The odds of there being another intelligent life form in the Milky Way are pretty good given the billions of stars. But we ...

K2-18b is one of the most promising worlds for the search for extraterrestrial life, so astronomers conducted an unusually ...

Astronomers have revised the mass of nearby exoplanet GJ 3378 b, recasting it as a rocky super‑Earth in the habitable zone ...

Interstellar asteroid Oumuamua arriving from Pleiades star cluster. Oumuamua 3D model: Credit: ESO/M. Kornmesse According to NASA, ‘Oumuamua is the first known interstellar object to visit our solar ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

A planet with one side permanently roasting and the other frozen in endless darkness might still have a chance of supporting life. Researchers found that heat inside a tidally locked exoplanet could ...

Get the latest federal technology news delivered to your inbox. You might think this column is about UFOs and the Pentagon's ...

Eventually, we'll launch a mission dedicated solely to studying an interstellar object. When that day comes, which one should ...

Project Hail Mary, Solaris, and The Hitchhiker's Guide to the Galaxy are all among the very best sci-fi books set in space.

Last year, an interstellar traveler entered our solar system. Some speculated that it was an alien spacecraft, but it turned ...