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National Science Foundation
Use image map to navigate to content Where did it all come from? What is our place in the cosmos? Are we alone? What is the universe made of, and how does it work? More!
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Astronomy & Space News See All
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two ultra-dense galaxies Hiding in plain sight: Undergraduates discover the densest galaxies known
Released July 27, 2015
News From the Field
UK National Physical Laboratory cesium fountain clock Precious time
The challenge of building a better atomic clock and why it matters
Released  June 24, 2015

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