AIM

High, Dry, and Rare in the Sky

Noctilucent clouds form so high in the atmosphere that they continue to reflect sunlight hours after sunset, creating a spectacular…

Another Lively Season of Night-Shining Clouds

Extremely cold and wet conditions in the mesosphere have led to abundant noctilucent clouds.

Clouds Light the Night

As spring turns to summer in the northern hemisphere, unusual streaks of clouds form high in the atmosphere around sunset.

Glow-in-the-Dark Clouds

Noctilucent clouds float high enough in the atmosphere to capture a little bit of stray sunlight even after the Sun…

Night-Shining Clouds

High-altitude clouds appeared as far south as the continental United States in early June 2015.

Early Start for Noctilucent Clouds

In the northern hemisphere, night-shining clouds seem to be forming earlier and spreading farther each year, as they did in…