Photograph by NASA/Goddard/SDO ‘An instrument on NASA’s Solar Dynamics Observatory (SDO) captured its 100 millionth image of the sun. The instrument is the Atmospheric Imaging Assembly, or AIA, which.
NGC the Iris Nebula. W/in the Iris, dusty nebular material sur-rounds a hot, young star. The dom-inant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight.