A gradual dimming and brightening when a star passed behind it suggested the mini-Pluto was wrapped in a thin layer of air.
A small, icy world orbiting beyond Neptune has no business holding onto an atmosphere. It is too small, too cold, and too far ...
The Webb telescope has detected a dark, atmosphere-less rocky exoplanet that could shed light on how Earth-like worlds die.
This model reveals how vastly different the atmosphere was on ancient Earth, and how life may have first emerged. The key to unlocking the secrets of distant planets starts right here on Earth.