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.

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

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

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

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

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

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

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

I thought about the interstellar visitor as my daughter, wife, and I took turns dragging his wandering monster truck balloon ...