File:20120831 234435.jpg
Original file (1,920 × 1,080 pixels, file size: 244 KB, MIME type: image/jpeg)
Summary[edit | edit source]
This is an image from the H-alpha sky survey. It is a composite of the Virginia Tech Spectral line Survey (VTSS) in the north and the Southern H-Alpha Sky Survey Atlas.
Licensing[edit | edit source]
| Description |
This is an image from the H-alpha sky survey. It is a composite of the Virginia Tech Spectral line Survey (VTSS) in the north and the Southern H-Alpha Sky Survey Atlas. |
|---|---|
| Source |
This image from NUIverse, at url=http://www.nuiverse.com/extras/73068156-6188-407b-9e18-a02365ebb5d5 No copyright to the image or the data from which it was generated is stated anywhere on the website. The data comes from Douglas Finkbeiner at Harvard University, url=http://astrometry.fas.harvard.edu/skymaps/halpha/data/v1_1/index.html. Again, no copyright is stated anywhere. |
| Date |
August 23, 2012. |
| Author |
David Brown is apparently the author of the image. |
| Rationale |
No free licensed or public domain alternatives known to exist to show a composite of the Virginia Tech Spectral H-alpha line Survey (VTSS) in the north and the Southern H-Alpha Sky Survey Atlas, about August 2012. |
| Permission |
Fair use, this is another image deleted from Commons as not free. |
This work is copyrighted. The individual who uploaded this work and first used it in an article, as well as subsequent persons who place it into articles, asserts that this qualifies as fair use of the material under United States copyright law.
This template must be accompanied by a {{Non-free media rationale}} justifying the assertion of fair use.
Note: The kinds of things that are considered acceptable for fair use on Wikiversity is significantly less than what is legally permitted. Please consult the Wikimedia Foundation Fair Use Policy to see if this content is permitted on Wikiversity under these further restrictions. Familiarize yourself with the Wikiversity Exemption Doctrine Policy before using this template.
The image is non-free fair use in Red astronomy.
Fair use for red astronomy[edit | edit source]
To illustrate the subject in question (an H-alpha sky survey of the Milkyway galaxy), since no picture can be obtained of the actual H-apha in natural color as it occurs in the Galaxy.
The image linked here is claimed to be used under fair use as:
- it is a scientifically significant image of the H-alpha distribution around the Milkyway galaxy from an Earth source;
- it is of much lower resolution than the original (copies made from it will be of very inferior quality),
- the photo is only being used for informational/educational purposes.
- Its inclusion in the article adds significantly to the article because it shows that H-alpha emitters exists across the Galaxy to the general public.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:25, 7 June 2013 | | 1,920 × 1,080 (244 KB) | Marshallsumter (discuss | contribs) | This is an image from the H-alpha sky survey. It is a composite of the Virginia Tech Spectral line Survey (VTSS) in the north and the Southern H-Alpha Sky Survey Atlas. |
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File usage
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