In the quest to find approximately Earth-sized planets located in the "Goldilocks zone" i.e. neither too hot nor too cold) ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Astronomers claim they've found the most promising signs of possible life on a planet outside of our solar system.

Combination of Cosmic Processes Shapes the Size and Location of Sub-Neptunes ... of one of the most common types of planets outside of our solar system, according to a new ...

A Southwest Research Institute-led study modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune in size, ...