File:Sunspot vtt1.jpg
Sunspot_vtt1.jpg (800 × 600 pixels, file size: 87 KB, MIME type: image/jpeg)
Summary[edit | edit source]
| Description |
A sunspot is a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun. |
|---|---|
| Source |
The image appears on a website entitled, "Astronomy Picture of the Day" at http://apod.nasa.gov/apod/ap051106.html. |
| Date |
31 July 1964 |
| Author |
Vacuum Tower Telescope, NSO, NOAO |
| Rationale |
No free licensed or public domain alternatives known to exist to show a close-up picture of a sunspot, a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun. The Sun's complex magnetic field creates this cool region by inhibiting hot material from entering the spot. Sunspots can be larger than the Earth and typically last for only a few days. This high-resolution picture also shows clearly that the Sun's face is a bubbling sea of separate cells of hot gas. These cells are known as granules. A solar granule is about 1000 kilometers across and lasts about 10 minutes. After that, many granules end up exploding. |
| Permission |
Fair Use, the file is being deleted from Commons because it is not a NASA image. "NSO allows reproduction, authorship of derivative works, and other transformations of the original work strictly for personal, non-profit/non-commercial/non-retail use without further permission, subject to the second paragraph under II.B. and the General Conditions section stated above." |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:52, 24 September 2019 | | 800 × 600 (87 KB) | Marshallsumter (discuss | contribs) | {{Information1 |Description = A sunspot is a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun. |Source = The image appears on a website entitled, "Astronomy Picture of the Day" at http://apod.nasa.gov/apod/ap051106.html. |Date = 31 July 1964 |Author = Vacuum Tower Telescope, NSO, NOAO |Rationale = No free licensed or public domain alternatives known to exist to show a close-up picture of a sunspot, a depression on the Sun's face that is slightly... |
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