The largest 2D map of the sky over Earth just got even bigger

The largest two-dimensional map of the sky over Earth ever created just got even larger and is now covering almost half the sky over Earth. 

The map created with data from a six-year-long pioneering survey of the cosmos features over a billion bright specks that represent galaxies, each containing billions of stars, according to the National Optical Astronomy Observatory (NRAO).  (opens in new tab)

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