Serpens is a large, sprawing constellation entangled with Ophiuchius. On morden charts it is divided into Serpens Caput and Serpens Cauda. Serpens Caput marks the head of the serpent, and is the larger of the two sections, and lies to the west of Ophiuchius, ajoining Bootes and Virgo. It contains numerous faint galaxies and the bright globular cluster M5.
Serpens Cauda is situated to the east of Ophiuchius, next to Scutum and Aquila. It is entirely contained in the Milky Way, and as a result is very rich in double stars. It also contains several faint globular clusters and emission nebulae, the brightest of which is M16, also known as the "Eagle nebula". There is one large open cluster, IC 4756.
These photographs show Serpens Cauda and the surrounding regions.