Though sun halos can happen year-round, they are especially noticeable in the winter when ice-filled cirrus clouds are more common.

Are snow-producing clouds an airframe icing risk? The short answer is yes, which might surprise pilots who fly under ...

Stars emerge from vast regions of gas and dust known as molecular clouds. These stellar nurseries, often spanning hundreds of ...

Stars are born in dense molecular clouds, but did they always form this way? Recent research suggests that in the early ...