Edmond Halley noted, in 1716: “This is but a little Patch, but it shows itself to the naked Eye, when the Sky is serene and the Moon absent.” Of course, M13 is now modestly recognised as the Great Globular Cluster in Hercules, one of the brightest globular star clusters in the northern sky. Telescopic views reveal the spectacular cluster’s hundreds of thousands of stars.

Date and place: March 13 2011; Colibasi, Giurgiu, Romania

Camera: Canon EOS 450D Baader modified

Telescope: StellarvueSV 80ED

Exposure: 10 x 7 min

Aperture: 7

ISO: 800