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EUNIS’ View of the Sun

NASA's EUNIS sounding rocket examined light from the sun in the area shown by the white line.
NASA's EUNIS sounding rocket examined light from the sun in the area shown by the white line to identify the temperature of material observed on the sun.

NASA’s EUNIS sounding rocket examined light from the sun in the area shown by the white line (imposed over an image of the sun from NASA’s Solar Dynamics Observatory) then separated the light into various wavelengths (as shown in the lined images – spectra – on the right and left) to identify the temperature of material observed on the sun. The spectra provided evidence to explain why the sun’s atmosphere is so much hotter than its surface. Credits: NASA/EUNIS/SDO

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