Messier 92 is a fine globular cluster that lies among the stars of northern Hercules, making it superbly placed in the summer sky for observers at mid-northern latitudes.
Look to southern Hercules and you’ll be thrilled to come across Rasalgethi (alpha [α] Herculis, the constellation’s lead star and a colour-contrast double star out of the top drawer.
It’s exciting to observing the multitude of bright globular clusters, incredibly dense balls of stars that provide striking viewing with even a modest optical aid, that are on show at this time of the year.
Messier 5 in Serpens Caput is a dynamic and beautiful globular cluster that can easily be spotted through a pair of binoculars and fruitfully observed through even a moderate-sized telescope.
There are very few deep-sky sights that can equal, let alone surpass, the magnificence of a great globular cluster filling the field of view of a high-power eyepiece, with myriad sparking suns crammed together and all vying for attention.
Magnificent Messier 51 (NGC 5194), the Whirlpool Galaxy in Canes Venatici, is without doubt the best and most famous example of a spiral galaxy that is presented face-on to our perspective.