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 possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 ...

Plus, an in-depth look at how the West Texas city of Seminole reacted when a measles outbreak tore through the region.

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