An astronaut and his new camera will peer at the heart of lightning storms to learn more about their structure.

European Space Agency astronaut Andreas Mogensen plans a stormy followup to his 2015 research on the International Space Station. Newly arrived at the orbiting complex for a six-month mission, Mogensen will look once again at lightning storms on Earth. Elusive phenomena he hopes to see include “blue jets” (upside-down lightning) and “red sprites” (discharges in a layer of the Earth’s atmosphere, known as the mesosphere.)

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