File:Ttt66 image5a.jpg
Ttt66_image5a.jpg (250 × 250 pixels, file size: 15 KB, MIME type: image/jpeg)
Summary edit
This image of the Sun is taken on December 16, 2008 during sunspot-minimum conditions, using light produced at a wavelength of 195 Angstroms (19.5 nanometers) by the ion Fe XII.
Licensing edit
| Description |
This image of the sun taken on December 16, 2008 during sunspot-minimum conditions, was created by isolating the light produced at a wavelength of 195 Angstroms (19.5 nanometers) by the ion Fe XII. By selecting the light from only one spectral line, a spectroheliograph works like a high-precision light filter and lets astronomers map, or image, a distant object in the light from a single spectral line. This information can be used to map the temperature and density changes in the gas. |
|---|---|
| Source |
url=http://sunearthday.gsfc.nasa.gov/2009/TTT/66_chemistry.php. |
| Date |
16 December 2008 |
| Author |
NASA/ESA, SOHO/EIT |
| Rationale |
No free licensed or public domain alternatives known to exist to show the sun taken on December 16, 2008 during sunspot-minimum conditions, was created by isolating the light produced at a wavelength of 195 Angstroms (19.5 nanometers) by the ion Fe XII. By selecting the light from only one spectral line, a spectroheliograph works like a high-precision light filter and lets astronomers map, or image, a distant object in the light from a single spectral line. This information can be used to map the temperature and density changes in the gas. |
| Permission |
Fair Use. While NASA files are usually free of copyright or PD, this file has been submitted for deletion from Commons. |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:15, 20 December 2013 | | 250 × 250 (15 KB) | Marshallsumter (discuss | contribs) | This image of the Sun is taken on December 16, 2008 during sunspot-minimum conditions, using light produced at a wavelength of 195 Angstroms (19.5 nanometers) by the ion Fe XII. Category:Coronal clouds |
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