Tag Archives: red sprites

Behold: a most usual sky. To wit:

It wasn’t unusual because of the central band the Milky Way Galaxy, visible along the image left. Most dark skies show part of the Milky Way. It wasn’t unusual because of the bright meteor visible on the upper right. Many images taken during last week’s Perseid Meteor Shower show meteors, although this Perseid was particularly bright. This sky wasn’t unusual because of the red sprites, visible on the lower right. Although this type of lightning has only been noted in the past few decades, images of sprites are becoming more common. This sky wasn’t unusual because of the nova, visible just above the image center. Novas bright enough to be seen with the unaided eye occur every few years, with pictured Nova RS Ophiuchus discovered about a week ago. What was most unusual, though, was to capture all these things together, in a single night, on a single sky. The unusual sky occurred above Zacatecas, Mexico.

(Image: Daniel Korona)

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Behold: one of the most spectacular shots yet of red sprite lightning. To wit:

Recent research has shown that following a powerful positive cloud-to-ground lightning strike, red sprites may start as 100-meter balls of ionised air that shoot down from about 80-km high at 10 percent the speed of light. They are quickly followed by a group of upward streaking ionised balls. The featured image was taken earlier this year from Las Campanas observatory in Chile over the Andes Mountains in Argentina. Red sprites take only a fraction of a second to occur and are best seen when powerful thunderstorms are visible from the side.

Let’s look a little closer, shall we?

Previously: No Sprite Is Safe

(Image: Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN)

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An extraordinary image captured by a very sensitive camera late last month on a summit of the Vosges mountains in France.

Fireworks? Of a sort, yes. To wit:

Generated over intense thunderstorms, this one about 260 kilometers away, the brief and mysterious flashes have come to be known as red sprites. The transient luminous events are caused by electrical breakdown at altitudes of 50 to 100 kilometers. That puts them in the mesophere, the coldest layer of planet Earth’s atmosphere. The glow beneath the sprites is from more familiar lighting though, below the storm clouds. But on the right, the video frames have captured another summertime apparition from the mesophere. The silvery veins of light are polar mesospheric clouds. Also known as noctilucent or night shining clouds, the icy clouds still reflect the sunlight when the Sun is below the horizon.

(Image: Stephane Vetter (TWAN, Nuits sacrees))

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