The U.S. space agency NASA is preparing to launch a new mission to study the sun. The Interface Region Imaging Spectrograph, or IRIS, will observe the way solar material gathers energy and heats up as it moves through the sun’s lower atmosphere.
The upper layer of the sun’s atmosphere, known as the corona, is thousands of times hotter than the sun’s surface.
Scientists want to figure out how that happens, so they are preparing a mission to study the sun’s so-called …
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