Add Yahoo as a preferred source to see more of our stories on Google. Noctilucent clouds glow above the horizon after sunset. The rare clouds form nearly 50 miles above Earth's surface in the ...

As summer gets under way in the Southern Hemisphere, electric blue clouds seeded by meteor dust begin to glow high in the sky over Antarctica’s vast icy reaches. This year, according to NASA, these ...

June features the shortest nights of the entire year north of the equator, but the biggest astronomy event of the month will unfold after the sun has climbed above the horizon over part of the globe.

On the cusp of our atmosphere live a thin group of seasonal electric blue clouds. Forming 50 miles above the poles in summer, these clouds are known as noctilucent clouds or polar mesospheric clouds – ...

In a few weeks, you may get to see evidence the atmosphere is changing – if you’re lucky. That’s when noctilucent clouds, the world’s highest, peak in number and show up in the night sky just after ...

"About 45 minutes before sunrise this cold morning after a storm front moved through the area, these clouds appeared which looked very similar to NLCs," Griffith told Spaceweather.com. "I've seen NLCs ...

Clouds come in all shapes and sizes, but one of the rarest forms where clouds seemingly shouldn’t exist at all: nearly 50 miles above Earth’s surface, at the edge of space. “Noctilucent clouds are the ...