NASA / SDO / SCIENCE PHOTO LIBRARY NASA / SDO / SCIENCE PHOTO LIBRARY
Sun and X1 solar flare. Composite ultraviolet image from the Solar Dynamics Observatory (SDO) of the Sun with an X1-class solar flare erupting at upper right (red area). The SDO is an Earth-orbiting spacecraft launched in 2010 by NASA and used to observe the Sun. Here, the Sun and its atmosphere (not seen in visible light) is seen combined at wavelengths of 304 and 171 angstroms (extreme ultraviolet). Image data obtained on 29 March 2014.
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