Scientists have been searching for radio signals from hypothetical alien civilizations using radio telescopes for decades.

The interstellar comet 3I/ATLAS is barreling toward its closest point to the sun as perihelion looms on Oct. 29. How different will it look when it reappears on the other side?

Material around Chiron, a small icy world in the far reaches of the solar system, may be taking shape into a ring system of ...

A few days ago, an inscrutable interstellar interloper made its closest approach to Mars, where a fleet of international spacecraft seek to unravel the red planet’s ancient mysteries. Several of the ...

Interstellar object 3I/ATLAS is on the opposite side of the sun from Earth - but several spacecraft are in the perfect position to get a closer look. As 3I/ATLAS warps and grows the closer it gets to ...

The mystery behind the famous 1977 “Wow!” signal has gained renewed attention after a Harvard astronomer proposed that the newly observed interstellar object 3I/ATLAS may be linked to the event. The ...

The comet is only the third interstellar object recorded in the solar system. Astronomers just caught a rare glimpse of an interstellar comet as it zoomed past Mars. Images of the object, dubbed ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Because the spacecraft are equipped with cameras that aren't designed to observe an object so far away, the images they captured were fuzzy. Still, scientists were able to get a little bit of a look ...

A mysterious interstellar comet — just the third such object ever confirmed to have entered our solar system — streaked past Mars last week. A spacecraft in orbit around the red planet had a front-row ...

Oct. 7 (UPI) --NASA and the European Space Agency are tracking the 3I/ATLAS interstellar object as it travels past Mars on its way toward the Sun and through the solar system. The object is thought to ...

Robots, they’re just like us—fascinated by the skies above them and the mysteries they hold. And now, NASA has revealed that its Mars Perseverance rover might have spotted a mysterious visitor from ...