August’s full moon, known as the Sturgeon Moon, rises on Saturday night, glowing low in the southeast shortly after sunset.

"Ball of Rock" by Rich Addis. (Image credit: Rich Addis) That’s no moon…it’s two moons! Rich Addis’s “Ball of Rock” photograph features two images of the moon blended together. One of ...

A research team in the United States has created a novel approach to integrate raw sky images and global solar irradiance measurements, solar nowcasting, and intra-hour forecasting. The ...