Our Sun !
A main sequence star, emits a strong solar flare flashes in this image captured by NASA's Solar Dynamics Observatory.
NASA/SDO
Extreme ultraviolet image of the Sun showing hot plasma at temperatures around 1,000,000 kelvins.
These emissions come from ionized iron atoms (Fe IX and Fe X) in the lower corona.
Image courtesy of NASA Solar Dynamics Observatory (SDO) Atmospheric Imaging Assembly (AIA).
NASA's Solar Dynamics Observatory captured an image of the sun "smiling" in 193 angstrom light on Oct. 26.
NASA/GSFC/SDO