GREGOR, the largest solar telescope in Europe, which is operated by a German consortium and located on Teide Observatory, Spain, has obtained unprecedented images of the fine-structure of the Sun. Following a major redesign of GREGOR’s optics, carried out by a team of scientists and engineers from the Leibniz Institute for Solar Physics (KIS), the Sun can be observed at a higher resolution than before from Europe.

In the last months, the EST Project Office at IAC and the review panel of the EST Science Advisory Group chaired by Rolf Schlichenmaier from KIS has worked on the definition of the EST light distribution system and instrument suite, using the guidelines laid down by the Science Requirement Document.