The LHS 1903 system defies expectations with a rocky outer planet, prompting new ideas about how planets form and evolve.

An interstellar comet changed its chemistry after passing the Sun, revealing hidden layers and a surprising mix of carbon ...

Scientists decided one way, but some states still see Pluto as a planet. So I asked the next generation their opinion.

Astronomers have long been puzzled by a cosmic mystery: planets orbiting two stars—like Star Wars’ Tatooine—are surprisingly rare, even though they should be common. New research suggests the culprit ...

The research team used additional data from the European Space Agency's Gaia satellite and ROSAT mission to identify stars in ...

A new study suggests alien life may be easier to detect through clusters of similar planets rather than single biosignatures.

Ancient Greeks believed in alien life, as well as in gods, souls, and beings that inhabited the Moon, stars, and Heavens.

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

Available as of April 15, a new installment written by Peter Hogan, with art by Steve Parkhouse, will finally give Harry and his friends the sendoff the show never had. Fittingly, the series comes ...

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

NASA officials have previously spoken of the possibility of extraterrestrial life amid scientific uncertainty while ...

If the government confirms nonhuman intelligence, psychological research offers clues about the range of ways humans might respond.