Noctilucent cloud - Wikipedia
Noctilucent clouds (NLCs), or night shining clouds, [1] are tenuous cloud-like phenomena in the upper atmosphere of Earth. When viewed from space, they are called polar mesospheric clouds (PMCs), detectable as a diffuse scattering layer of water …
Noctilucent clouds — Everything you need to know | Space
2024年6月5日 · 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...
Eerie Clouds Glow at Night—How to See Them - National …
2017年6月22日 · Noctilucent clouds were first recorded in 1885 after a volcanic eruption on the Indonesian island of Krakatoa, which sent a massive ash cloud into the upper atmosphere that circled Earth for...
Noctilucent Definition & Meaning - Merriam-Webster
noc· ti· lu· cent. -ᵊnt. 1. [from noctilucence, after such pairs as English translucence : translucent] : bioluminescent. 2. [noct- + lucent] : visible or glowing at night see noctilucent cloud. Love words?
Noctilucent clouds: Best season in years, happening now! - EarthSky
2024年6月30日 · Noctilucent clouds, or night-shining clouds, are thin clouds high up in Earth’s atmosphere – the mesosphere – as much as 50 miles (80 km) above Earth’s surface. Scientists think they’re ...
NOCTILUCENT Definition & Meaning - Dictionary.com
Noctilucent definition: (of high-altitude clouds) visible during the short night of the summer.. See examples of NOCTILUCENT used in a sentence.
NASA – Noctilucent Clouds - Science@NASA
2008年5月6日 · Noctilucent clouds, also known as polar mesospheric clouds, form in a part of the atmosphere roughly 50 to 86 kilometers (30 to 54 miles) above the surface of our planet. In the months following AIM’s early observations, researchers working with the …
Understanding the Glow of Noctilucent Clouds - ThoughtCo
2019年7月3日 · Noctilucent clouds are beautiful wispy collections of ice particles that form high in our planet's atmosphere. They are visible from high latitudes.
Noctilucent cloud | Polar Mesosphere, Nocturnal & Stratospheric ...
Noctilucent cloud, rare cloud form, probably composed of ice crystals and dust from meteor smoke, that occurs at a higher altitude than any other cloud form (about 82 km [50 miles]). The ice crystals form because this level is the coldest in the entire upper atmosphere; even …
High, Dry, and Rare in the Sky - NASA
Noctilucent clouds, also called polar mesospheric clouds or “night-shining” clouds, occur most often near the poles and occasionally at lower latitudes. The phenomenon is seasonal and depends on just the right combination of atmospheric conditions.