Astrology is built on the known planets - but what if something important has been missing all along? Planet 9, lurking ...

The James Webb telescope has made another stunning discovery -- this time of a massive planet that could potentially sustain ...

No telescope has basked in the night sky quite like the enormous new Vera Rubin Observatory. Here's what it could reveal ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

The flares may heat up and inflate the planet's atmosphere, which is dominated by hydrogen and helium. Being lashed by these ...

Stephanie Vermillion is a travel journalist and photographer covering culture and adventure for Travel + Leisure Outside, and ...

For years, scientists have been scanning the icy outskirts of our Solar System for an unknown massive planet. The ...

The Vera C. Rubin Observatory is expected to find millions of unknown objects in our solar system, and perhaps even a mysterious Planet Nine.

New research shows there is at least a 40% chance of the existence of Planet Nine, but scientists are still looking for definitive proof.

WASHINGTON, June 25 (Reuters) - In addition to providing a trove of information about the early universe, the James Webb ...

The outlook is promising for future long-term monitoring of planets across multiple wavelengths. Infrared imaging data from ...