Like in Martian wonderland

On this image, taken on 9 April 2016 before dawn, the Milky Way arches over ALMA observatory – the largest ground astronomical observatory in the world, located in Chilean Chajnantor Plateau in 5040m (over 16400ft) altitude. Sky should be deeply dark, considering the altitude, however due to atmopsheric airglow it is not so far. In …

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