On October 6 1995, at a scientific meeting in Florence, Italy, two Swiss astronomers made an announcement that would transform our understanding of the universe beyond our solar system. Michel Mayor ...

A distant flicker of light from a star can reveal more than you might expect. In fact, a brief, subtle brightening in the sky has helped scientists uncover something astonishing: planets much like ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...