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The Sloan Guide to the Universe

Since 2000, scientists with the Sloan Digital Sky Survey have been meticulously scanning the sky to create a map of our universe. The SDSS’s map is in full color, covers more than one quarter of the entire sky, and consists of more than one trillion pixels, full of so much detail that to view it all, you would need five hundred thousand high-definition TVs.

The final version of this map was made available online last year, with tools to look at and search through it.

This video shows the positions of the 900,000 luminous galaxies used in recently published studies showing the 3D positions of galaxies throughout much of the universe, giving clues to universal origin while looking for baryonic acoustic oscillations, echoes from The Big Bang itself.

Each green dot represents one galaxy. The image covers a redshift range from 0.25 to 0.75, reaching to six billion years ago. The rotation of the image provides a view that shows what the distribution would look like from all sides. »

Posted on Friday, January 13th, 2012 at 3:21 PM Total plays: times