The rare type of cloud, whose name is Latin for "roughness," was first observed in 2006 by an amateur cloudspotter in Iowa.

A recent satellite image captured the reemergence of a unique, UFO-like cloud, known as the "Taieri Pet," which appears above ...

Join a Mars science team. NASA put out a call for volunteers willing to gaze at spacecraft images of Mars to look for ethereal clouds floating over the red planet.

Have you ever looked up at the sky and noticed how clouds often form in distinct layers, with some huddled close to the ground while others seem to float high above? The stratification of clouds in ...