Alfred-Jensch-Teleskop in the <a href="https://en.wikipedia.org/wiki/Karl_Schwarzschild_Observatory" class="extiw" title="en:Karl Schwarzschild Observatory">Karl Schwarzschild Observatory</a> in <a href="https://en.wikipedia.org/wiki/Tautenburg" class="extiw" title="en:Tautenburg">Tautenburg</a>, Germany
Ximeg
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>