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

For millennia, astronomers thought Uranus was no more than a distant star. It wasn’t until the late 18th century that Uranus was universally accepted as a planet. To this day, the ringed, blue world ...

"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | ...

Within 250 million years, Earth’s continents may reunite into a single supercontinent — either Pangaea Proxima or Amasia — reshaping the planet in ways never seen before.