MAKE A MEME View Large Image Usno-fountain.jpg en Cesium fountain atomic clock at USNO United States Naval Observatory http //tycho usno navy mil/clockdev United States Naval Observatory PD-USGov-Military-Navy Caesium clocks
View Original:Usno-fountain.jpg (719x539)
Download: Original    Medium    Small Thumb
Courtesy of:commons.wikimedia.org More Like This
Keywords: Usno-fountain.jpg en Cesium fountain atomic clock at USNO United States Naval Observatory http //tycho usno navy mil/clockdev United States Naval Observatory PD-USGov-Military-Navy Caesium clocks
Terms of Use   Search of the Day