There’s something truly enchanting about catching sight of iridescent clouds, shimmering like a spilled box of pearls against ...

Early Tuesday morning, a delicate, wispy cloud type rarely seen formed over western Montana, lighting up the pre-dawn sky.

Noctilucent clouds are wispy, silvery-blue clouds found at much higher altitudes than usual. While most clouds form in the troposphere between Earth’s surface and about 11 miles above the ground ...

Noctilucent clouds are rare high-altitude clouds visible only under certain conditions. They form during the summer months and appear after sunset as delicate, wispy blue or silver streaks across ...

These high-altitude clouds, ... Earth's highest clouds, shine blue in the twilight sky from late May to August in the northern hemisphere — and all you need are your naked eyes.

Around this time, the sun never dips far below the horizon, leaving it well placed to illuminate the high-altitude icy particles as night settles in. Noctilucent clouds most commonly appear ...

The answer lies in their unique positioning. As the sun dips below the horizon, its rays continue to illuminate these high-altitude clouds, while the lower atmosphere remains cloaked in darkness.

Those high clouds should still allow you to see the eclipse. Here is the total cloud cover forecast at 3 p.m. Eastern today, right around the time of the solar eclipse.

NASA Wants Your Help to Study These Rare, High-Altitude Clouds That Appear to Glow at Sunrise and Sunset Noctilucent clouds usually form close to the poles, but in recent decades, they’re being ...