stratosphere

Blue jets are a unique type of lightning that appear to move in reverse, shooting up from thunderclouds and into the stratosphere at speeds of up to 50 kilometers per second. Unlike regular lightning, blue jets are known for their striking blue hue, which is created when they excite mostly stratospheric nitrogen gases. Although blue jets have been observed from the ground … [Read more...] about Blue Jets: How Scientists Captured the Spark that Triggers Exotic Lightning