Globular cluster M4 in Ophiuchus, 7000 lightyears away, diameter 53 lightyears, i.e. 30%of the size of Omega Centauri-the relative largest gc to be seen from Earth(see photo below)- but only half its distance. Left in the photo you can see Antares and above another globular cluster, NGC 6144, 27000 lightyears away and 71 lightyears diameter. M4 covers an area nearly as large as the full moon.
Astro photo taken using 80/480 triplet APO at Emberger Alm, Carinthia, Austria.