The tiny pebbles left over from a star's formation fed the growth of one of the strangest, wildest worlds humanity has ever ...

Noctilucent cloud season is upon us. If you’re in the Northern Hemisphere this summer, keep your head to the skies at sunset ...

Weather officials say different types of clouds can tell you what kind of weather to expect. Here's a look at the different ...

The fleeting glow of noctilucent clouds is once again making its appearance in Earth’s upper atmosphere, signaling the start ...

The best time to see noctilucent clouds is on clear nights between late May and mid-August, about 90 to 120 minutes after ...

New research shows that penguin guano in Antarctica is an important source of ammonia aerosol particles that help drive the ...

Volcanic ash from eruptions can reshape cirrus clouds, forming giant ice crystals and altering how Earth traps heat in the ...

Parts of the United States have gotten an early taste of summer weather, as temperatures and humidity are on the rise. Summer ...

Penguin droppings release ammonia that forms clouds, affecting Antarctica's climate and potentially slowing warming.

Noctilucent clouds, Earth's highest clouds, shine blue in the twilight sky from late May to August in the northern hemisphere ...

When a volcano erupts, it can spew ash high into the atmosphere—inserting aerosols right where clouds typically form. How ...