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On Thursday 18 August, the sky above the Allgäu Public Observatory in southwestern Bavaria was an amazing sight, with the night lit up by two very different phenomena: one an example of advanced technology, and the other of nature’s dramatic power. As ESO tested the new Wendelstein laser guide star unit by shooting a powerful laser beam into the atmosphere, one of the regio...See More — with Rose Aquino, Colette Fletcher, Rosabel Cintron Rosado and Kathy Harris.

Peak- the light source (from a high, unseen angle) contrasting with the darker clouds, and the texture of them create a peak More