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

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

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

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