From Lowell Observatory to Kitt Peak to Mount Graham, here are the 11 best planetariums and observatories in Arizona and ...

Weather forecasters expect strong to severe thunderstorms Tuesday afternoon and evening, with rainy weather to follow ...

The National Weather Service says there's a chance of strong to severe thunderstorms in most of Pennsylvania Tuesday night.

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