Cloud computing and blue-sky thinking: An atmospheric scientist illuminates the science of clouds in Earth’s sky and beyond. Studying the physics and microphysics of cloud formation and behavior in ...

This visible light mosaic shows the Large Magellanic Cloud and Small Magellanic Cloud. Separated by about 21 degrees, the two galaxies are readily visible from the Southern Hemisphere as faint ...

Night sky photographer Ruslan Merzlyakov captured bright blue-white noctilucent clouds dancing over Nykøbing Mors in Denmark just before dawn on July 1.

From UFO-like rings and whirlpools of light to rainbow clouds and laser lines, here are 10 strange visual phenomena that can be easily explained by science.

These tiny atmospheric bits are closer in size to shorter wavelengths, which is why blue and violet light scatter more easily. The result is our beautiful blue sky. But wait!

When you look up at the night sky, can you see the stars? If you live in a large city or near one, the answer is probably no. The culprit is not just clouds and weather — it's light pollution.