An international team of astronomers reports the discovery of a new exoplanet orbiting a sunlike star as part of the Next ...

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

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed ...

The Expanse is renowned as one of the foremost sci-fi space operas of the 21st century, but it completely switches genre ...

British sci-fi television is among the most influential in the genre, and this forgotten series from the 1970s is a part of ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

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

From Metroid Prime to Mass Effect 2, these sci-fi games are the very definition of perfection, offering experiences unlike ...

The video ranks the wildest alien megastructure ideas, from famous Dyson spheres to black-hole planets, ring worlds, ...

More than 500,000 stars glow in shades of red, white, and blue in a spectacular new image captured by NASA's Hubble Space ...

A Catholic nun made a startling assertion about UFOs, cautioning that purported alien encounters are in fact a menacing ...