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Posted by zenobiusz w dniu 30 Sierpień 2011
MONDAY, 29 AUGUST 2011
High above Earth in the realm of meteors and noctilucent clouds, a strange and beautiful form of lightning dances at the edge of space. Researchers call the bolts „sprites”; they are red,fleeting, and tend to come in bunches. Martin Popek of Nýdek in the Czech republic photographed these specimens on August 27th:
„Sprites are a true space weather phenomenon,” explains lightning scientist Oscar van der Velde of Sant Vicenç de Castellet, Spain. „They develop in mid-air around 80 km altitude, growing in both directions, first down, then up. This happens when a fierce lightning bolt draws lots of charge from a cloud near Earth’s surface. Electric fields [shoot] to the top of Earth’s atmosphere–and the result is a sprite. The entire process takes about 20 milliseconds.”
Although sprites have been seen for at least a century, most scientists did not believe they existed until after 1989 when sprites were photographed by cameras onboard the space shuttle.
More over red sprites here
W górę Błyskawica i Blue Jets