As this interstellar object approached its closest point to Earth, a massive radio telescope attempted to sniff out a ...

Interstellar comet 3I/ATLAS reveals ancient secrets and strange chemistry as the largest object of its kind ever tracked.

Mars. From forming black holes to phantom dark energy, discover the cosmic mysteries astronomers uncovered last year.

Harvard's Avi Loeb argues 3I/ATLAS shows signs of alien technology, from its 0.2% probability flight path to bizarre metal ...

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

With 3I/ATLAS streaking away from our planet, speculation remains as to whether the interstellar comet is alien or not.

A new study referencing a past NASA Cassini observation found the presence of 'slushy tunnels' in Saturn's largest moon Titan ...

Many experts believe that aliens exist in the universe, with the key elements needed to sustain life found on comets, ...

Europa has a vast, saltwater ocean beneath its icy shell, with more than twice the amount of water in all of Earth’s oceans ...

Astrophysicists are mapping a vast, hidden structure in the gas around the Sun that behaves like a tunnel carved through ...

The night was warm and muggy over New Castle Air Force Base in Delaware, the kind of heat that clung to the metal skins of the alert fighter jets lined along the runway.

It's impractical to use a real home, so they constructed most of the interior sets inside the gym at New Trier High School in ...