A mysterious visitor from another star system is carrying secrets billions of years old. Its composition could reveal how ...

Aristotle's views on the nature of the cosmos dominated the Ancient Greek world. He argued that there's only one world, at ...

The ExoLife Finder (ELF) looks like no telescope ever built. A spectacular crown of 15 five-meter mirrors perches atop a ...

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

'Do all aliens really need sunlight?' ...

When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that ...

Alan Tudyk's 4-part sci-fi saga is making a comeback with a new project, giving fans some closure after last year's sudden ...

Alien megastructures built to harvest stellar energy or alter the orbits of stars may be physically feasible, according to a ...

Explore how cutting edge telescopes, AI, and new detection methods are transforming the extraterrestrial life search and ...

"Star Trek" might be one of the most legendary, iconic sci-fi shows in the history of television, but that doesn't ...

Even at a glance, the planets in our solar system are wildly diverse. Huge and small, airless and densely packed with ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new "hot ...