Hello, Eos! Recently discovered molecular cloud is believed to be one of the largest structures in the sky and among the closest to Earth and the sun.

Dust devils are perhaps one of the most unique Arizona weather phenomena. But why do you see them so often? Here's the science behind the twisters.

The cloud, named Eos after the Greek goddess of dawn, had eluded researchers because it contains very little carbon monoxide ...

The cloud, named Eos, is chock-full of molecular hydrogen and possibly rife with star-forming potential in the future.