knowledgethroughscience: NASA’s newest sun-watching satellite, the Interface Region Imaging Spectrograph (IRIS), sent back its first image of the Sun’s lower atmosphere on June 25 - the clearest picture ever of this mysterious region. A large dark

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knowledgethroughscience: NASA’s newest sun-watching satellite, the Interface Region Imaging Spectrograph (IRIS), sent back its first image of the Sun’s lower atmosphere on June 25 - the clearest picture ever of this mysterious region. A large dark

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