"Star Trek" is home to countless alien species, many of whom offer beloved characters. Some are not. We rank the 10 most ...

As the year draws to a close, we take a look at some of the biggest science stories of the year, and why they matter.

Star Citizen developer Cloud Imperium Games has told fans that the Mark Hamill-fronted single-player story space adventure ...

Interstellar object 3I/ATLAS is confirmed as a natural comet from beyond our solar system, posing no threat to Earth despite ...

Interstellar object 3I/ATLAS, the third such visitor ever observed, is exhibiting unusual energy and chemical behavior as it ...

I/ATLAS has passed its closest point to Earth, meaning we will soon lose sight of it for good. Some scientists want to send a spacecraft to chase down the alien comet — or the next interstellar object ...

The Sun is huge, but it's a speck of dust compared to the universe's true giants. This video introduces Stevenson 218, the largest known star, a red supergiant so vast it could swallow our solar ...

NASA reveals high-resolution images of interstellar comet 3I/ATLAS after the US shutdown. Is it alien tech? Associate ...

A Carnegie-led team of astronomers detected the strongest evidence yet of an atmosphere around a rocky planet beyond our ...

Star Citizen developer Cloud Imperium Games has told fans that the Mark Hamill-fronted single-player space adventure Squadron ...

NASA has pinpointed the exact moment when interstellar comet 3I/ATLAS, the object suspected to be an alien spacecraft, made ...

The comet will come much closer to Jupiter in March, zipping within 33 million miles. It will be the mid-2030s before it reaches interstellar space, never to return, said Paul Chodas, director of NASA ...