10 Aug '12, 12am

3-D Map Of The Universe, Largest Most Accurate Map Ever Created

3-D Map Of The Universe, Largest Most Accurate Map Ever Created

“That map of the universe is the centerpiece of DR9. The release includes images of 200 million galaxies and spectra of 1.35 million galaxies, including new spectra of 540,000 galaxies from when the universe was half its present age. Spectra show how much light a galaxy gives off at different wavelengths. Because this light is shifted to longer redder wavelengths as the universe expands, spectra allow scientists to figure out how much the universe has expanded since the light left each galaxy. The galaxy images, plus these measurements of expansion, are combined by SDSS-III scientists to create the three-dimensional map released with DR9.”

Full article: http://planetsave.com/2012/08/09/3-d-map-of-the-universe-...

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