A young world drifting alone through space is putting on one of the most violent growth spurts astronomers have ever seen, ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...

"It's almost unfathomable to imagine what is happening to this planet. The planet's atmosphere simply cannot withstand the high X-ray dose it's receiving from its star." When you purchase through ...

Since astronomers discovered the first world outside the solar system in the mid-1990s, these extra-solar planets or "exoplanets" have astounded us with their strange characteristics. A new discovery, ...