A new explanation for the solar system's radioactive elements suggests Earth-like planets might be found orbiting up to 50 ...

The interstellar comet will pass safely by Earth, giving astronomers their best chance to study it up close. Interstellar ...

The interstellar comet known as 3I/Atlas will pass within 167 million miles of our planet Friday – the closest it gets on its ...

A rare interstellar visitor, comet 3I/ATLAS, is drawing attention as it approaches Earth, growing brighter and taking on a ...

I/ATLAS comet is the 3rd-ever object discovered that originated from outside our solar system. It's not a threat, approaches ...

Rocky planets like our Earth may be far more common than previously thought, according to new research published in the ...

Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.

Nearly 4.5 million years ago, two large, hot stars brushed tantalizingly close to Earth's sun. They left behind a trace in ...

NASA's Hubble Space Telescope caught a glimpse of 3I/ATLAS – again. Here's a look at the latest photo of the intriguing ...

An interstellar tourist is taking a quick trip through our solar system, becoming one of just three known objects to ever do so, according to NASA. A comet from a solar system outside our own was ...

A distant gas giant the size of 10 Jupiter planets is now the first planet outside Earth's solar system to be mapped in three dimension, a team of astronomers says. What's more, the researchers are ...

Okay, it's not quite that common an occurrence, but there are indeed a number of firms giving this a go. The latest to join ...