Laser shining skyward

A visible green laser shone from ESA's Optical Ground Station (OGS). Part of Teide Observatory, the OGS located 2400 m above sea level on the volcanic island of Tenerife, used for the development of optical communication systems for space as well as space debris and near-Earth orbject surveys and quantum communication experiments. The laser looks curved because this picture was taken with a fisheye lens.