Just how big would a telescope need to be to actually see an alien world in detail? The James Webb Telescope just took a photo of a newly discovered exoplanet. Exciting stuff but the raw image just ...

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 ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is hidden in our solar... If Planet Nine is out there, this telescope might ...