A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White House to lead a ...

Avi Loeb, a cosmologist who studied black holes and served as head of Harvard’s astronomy department until 2020, has been ...

Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life.

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

"Eventually, our own Voyager spacecraft will be extraterrestrial artifacts in other stellar systems." ...

The Harvard astrophysicist has devoted years—and thousands of interviews—to the idea that mysterious objects streaking ...

Deep within Uranus and Neptune, immense pressure and heat are transforming carbon into diamonds that rain down through the ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

A self-proclaimed psychic has tearfully claimed that aliens are about to invade the planet and are targeting the World Cup ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...

James Webb uncovered exotic salt clouds surrounding the famous "Pink Planet," solving a long-standing mystery about one of ...

A small space telescope with the eyes of a giant will spend the next year studying the planets around distant stars, and the University of Arizona will serve as mission control. The refrigerator-sized ...