Sun  ID: 4117

Solar Dynamics Observatory - Argo view

Argos (or Argus Panoptes) was the 100-eyed giant in Greek mythology (wikipedia).

While the Solar Dynamics Observatory (SDO) has significantly less than 100 eyes, (see "SDO Jewelbox: The Many Eyes of SDO"), seeing connections in the solar atmosphere through the many filters of SDO presents a number of interesting challenges. This visualization experiment illustrates a mechanism for highlighting these connections.

The wavelengths presented are: 617.3nm optical light from SDO/HMI. From SDO/AIA we have 170nm (pink), then 160nm (green), 33.5nm (blue), 30.4nm (orange), 21.1nm (violet), 19.3nm (bronze), 17.1nm (gold), 13.1nm (aqua) and 9.4nm (green).

We've locked the camera to rotate the view of the Sun so each wedge-shaped wavelength filter passes over a region of the Sun. As the features pass from one wavelength to the next, we can see dramatic differences in solar structures that appear in different wavelengths.

  • Filaments extending off the limb of the Sun which are bright in 30.4 nanometers, appear dark in many other wavelengths.
  • Sunspots which appear dark in optical wavelengths, are festooned with glowing ribbons in ultraviolet wavelengths.
  • Small flares, invisible in optical wavelengths, are bright ribbons in ultraviolet wavelengths.
  • If we compare the visible light limb of the Sun with the 170 nanometer filter on the left, with the visible light limb and the 9.4 nanometer filter on the right, we see that the 'edge' is at different heights. This effect is due to the different amounts of absorption, and emission, of the solar atmosphere in ultraviolet light.
  • In far ultraviolet light, the photosphere is dark since the black-body spectrum at a temperature of 5700 Kelvin emits very little light in this wavelength.



Related Documentation


Visualization Credits

Tom Bridgman (GST): Lead Animator
William D. Pesnell (NASA/GSFC): Scientist
Barbara Thompson (NASA/GSFC): Scientist
C. Alex Young (NASA/GSFC): Scientist
Please give credit for this item to:
NASA's Goddard Space Flight Center Scientific Visualization Studio

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Data Used:
SDO/AIA/131 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/335 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/HMI/Continuum 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/304 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/211 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/193 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/171 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/1700 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/1600 Filter 2011-09-25T08:00 - 2011-09-26T01:00
SDO/AIA/94 Filter 2011-09-25T08:00 - 2011-09-26T01:00
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

This item is part of this series:
SDO Jewelbox

SVS >> Sun
GCMD >> Earth Science >> Sun-earth Interactions
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Solar Flares
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Solar Ultraviolet
SVS >> Hyperwall
SVS >> Solar Dynamics Observatory
SVS >> Heliophysics
SVS >> Corona
NASA Science >> Sun
SVS >> Presentation

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version

Places you might have seen this:
and on pp 26-27.