Last year, an interstellar traveler entered our solar system. Some speculated that it was an alien spacecraft, but it turned ...

A planet with one side permanently roasting and the other frozen in endless darkness might still have a chance of supporting life. Researchers found that heat inside a tidally locked exoplanet could ...

Some of the coldest objects currently listed as stars in the Milky Way may not be stars at all. A new study by astrophysicist ...

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed ...

Get the latest federal technology news delivered to your inbox. You might think this column is about UFOs and the Pentagon's ...

This video takes viewers on a cinematic voyage to some of the most extraordinary and extreme planetary systems discovered in ...

Astronomers have revised the mass of nearby exoplanet GJ 3378 b, recasting it as a rocky super‑Earth in the habitable zone ...

Eventually, we'll launch a mission dedicated solely to studying an interstellar object. When that day comes, which one should ...

Tau is in sight.

Director Steven Spielberg claimed aliens have already visited planet Earth – and now scientists said he may be on the money, ...

Ever so slightly bigger than Earth, the exoplanet LHS 3844b orbits its parent star, LHS 3844, a red dwarf 48.5 light-years ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...