Astronomers witness first moments of planet formation as rock grains crystallize around distant star HOPS-315.

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one ...

The astronomers observed hot minerals just beginning to solidify – the first specks of planet-forming material, the astronomers said. A gaseous disk surrounding the young star is the first stages of ...

M. McClure et al./Cover Images Astronomers have spotted the birth of a new solar system for the very first time ever. Using ...

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 ...