The globular cluster M13 in constellation Hercules - and a telescope first light
M13 ist probably one of the most well known globular clusters of the northern hemisphere and very simple to find in the constellation Hercules. When it is comfortably warm in the northern hemisphere in spring and early summer the cluster stands high in the sky and is a popular object for observation. For its high stellar density and apparent brightness astronomical photographers often choose it as a reference object to test a new optical setup for its image quality. This was my major motivation for this image, too. In the end the result was convincing and I chose to present it on this page.