File:USNO rubidium fountain.jpg
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USNO_rubidium_fountain.jpg (250 × 282 pixels, file size: 20 KB, MIME type: image/jpeg)
Summary
| Description |
English: Rubidium (Rb) fountain atomic clock at the U.S. Naval Observatory |
| Source | U.S. Naval Observatory |
| Author | U.S. Naval Observatory |
For description, see http://www.skyandtelescope.com/community/skyblog/newsblog/36234159.html archive copy at the Wayback Machine
Licensing
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:54, 4 September 2010 |  | 250 × 282 (20 KB) | Coenen | {{Information |Description={{en|1=Rubidium (Rb) fountain atomic clock at the U.S. Naval Observatory}} |Source=U.S. Naval Observatory |Author=U.S. Naval Observatory |Date= |Permission= |other_versions= }} For description, see http://www.skyandtelescope.com |
File usage
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