The Sun now

Visible light

HMI Continuum
Continuums provide photographs of the solar surface, incorporating a broad range of visible light. Solar Region: Photosphere

Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.

193 Å

AIA 193
Emitted by iron-12 (Fe XII) at 1,000,000 K and iron 24 (Fe XXIV) at 20,000,000 Kelvin. The former represents a slightly hotter region of the corona and the later represents the much hotter material of a solar flare. This wavelength is typically colorized in light brown. Solar Region: Corona/Flare Plasma

Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.


The data are provided by NASA/SDO/GSFC

The Solar Dynamics Observatory (SDO), launched on February 11, 2010, provides ultra high-definition imagery of the Sun in 13 different wavelengths, utilizing two imaging instruments, the Atmospheric Imaging Assembly (AIA) instrument and the Helioseismic and Magnetic Imager (HMI). Each wavelength is based on one or two types of ions — though slightly longer and shorter wavelengths produced by other ions are also part of the picture. Each wavelength was chosen to highlight a particular part of the sun’s atmosphere, from the solar surface to the upper reaches of the sun’s corona.

Here on NOSWE site we chose to provide two pictures of the solar surface that depict the photosphere and the Corona, respectively, because these give a good intuitive view of the active regions/sunspots and the coronal holes, both of which are crucial when considering space weather.