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February 2, 2021 at 6:30 am Scientists have finally gotten a clear view of the spark that sets off a weird type of lightning called a blue jet. Lightning bolts usually are seen zipping from thunderclouds down toward the ground. But blue jets shoot up from clouds. They ascend high into a layer of the atmosphere called the stratosphere. In less than a second, a blue jet can reach about 50 kilometers (31 miles) above the ground. In the stratosphere, this electricity excites mostly nitrogen gas. That nitrogen glows blue, giving these jets their signature color. Blue jets have been seen from the ground and airplanes for years. But it was hard to tell how this weird lightning formed without seeing it from above. So scientists looked for a blue jet using the International Space Station. And they spotted one in February 2019. It appeared above a storm over the Pacific Ocean near Australia. Using cameras and other sensors on the space station, scientists could see how the blue jet formed.

Kongens lyngbyPacific oceanTorsten neubertTechnical university of denmarkInternational spaceTechnical universityVictor paskoPennsylvania state universityபெஸிஃபிக் கடல்தொழில்நுட்ப பல்கலைக்கழகம் ஆஃப் டென்மார்க்சர்வதேச இடம்தொழில்நுட்ப பல்கலைக்கழகம்பென்சில்வேனியா நிலை பல்கலைக்கழகம்