Sun observed at different wavelengths. Collage of solar images from NASA's Solar Dynamics Observatory (SDO). Observing the Sun in different wavelengths helps highlight different aspects of the sun's surface and atmosphere. From top left to bottom right, the first 3 images are from the Helioseismic and Magnetic Imager (HMI): dopplergram, magnetogram, and continuum (visible light at 61MB7.3 nanometres, orange/yellow). The other 11 images are from the Atmospheric Imaging Assembly (AIA): 170MBnm (pink), 45MB0MBnm (light green), 160MBnm (dark green), 30MB.4nm (orange), 17.1nm (gold), 19.3nm (bronze), 21.1nm (violet), 33.5nm (blue), 9.4nm (bright green), and 13.1nm (aqua).