SDO AIA 304 Angstrom

AIA 304 Å - Solar Region: Transition Region/Chromosphere
Emitted by helium-2 (He II) at around 50,000 Kelvin. This light is emitted from the chromosphere and transition region. SDO images of this wavelength are typically colorized in red. Credit: NASA/SDO/Goddard
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How SDO Sees the Sun

The sun emits light in all colors, but since yellow is the brightest wavelength from the sun, that is the color we see with our naked eye. Specialized instruments can observe light far beyond the ranges visible to the naked eye. Different wavelengths convey information about different components of the sun's surface and atmosphere.

The Solar Dynamics Observatory, or SDO, images 10 different wavelengths, measured in angstroms (Å), with its Atmospheric Imaging Assembly (AIA) instrument. SDO’s Helioseismic and Magnetic Imager (HMI) instrument focuses on the movement and magnetic properties of the sun's surface and provides 3 additional images.

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Page Last Updated: August 4th, 2014
Page Editor: Holly Zell