Astronomers think small space rocks from beyond our solar system routinely strike Earth—but proving it isn’t easy ...

Are interstellar objects proof of alien life? This could finally settle the debate. The Vera Rubin telescope is poised to kick off an explosive era of discovery. "It's like old-fashioned astronomy ...

The interstellar interloper is zipping through our solar system at ludicrous speeds, clocking in at 37 miles (60 kilometers) per second.

The paper presented several anomalous characteristics of the object, which could indicate that it is not a comet at all but instead a directed craft.

Scientists have examined the interstellar invader 3I/ATLAS, finding evidence that it is packed with water that could be older than the solar system.

Scientists theorize interstellar comet 3I/ATLAS may be an alien spaceship due to its odd behavior.

These stars would have been the forges of all subsequent elements through the process of stellar nucleosynthesis ... near pristine, interstellar medium,” the authors explain. This lack of oxygen is a ...

Our understanding of the universe begins with the Big Bang, a moment in time where the universe began expanding into what we see around us now. Big Bang nucleosynthesis describes how only the ...

A newly discovered comet, 3I/ATLAS, may be the most ancient visitor ever detected, potentially older than our solar system itself. Unlike previous interstellar objects, this ice-rich comet seems ...

3I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

Interstellar objects like this one are “pristine, primordial remnants from the planet formation process in other planetary systems,” Darryl Seligman, an associate professor of physics and ...

An interstellar object currently passing through our solar system might be one of the oldest comets we have ever seen, originating from a star billions of years older than our own. Comet 3I/ATLAS ...