For the unversed, "Planet Nine" is a hypothetical planet which is reportedly larger than Earth that is thought to orbit ...

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system ...

A sweeping new ICE operation shows how Donald Trump’s focus on immigration is reshaping federal law enforcement.

It had not been thought possible that such tiny, weak stars could provide the conditions needed to form and host huge planets.