CYGNUS, the Swan is a constellation of the Summer and Autumn skies it culminates (crosses the southern meridian) at a point almost overhead (at the zenith), around Astronomical Midnight
(1 am BST) at the end of July the constellation directly to the west (right) is Lyra, the Lyre, lying at a greater distance to the east (left) are the four stars making up the great autumn 'Square of Pegasus'. During autumn and the early winter , Cygnus, with
outstreached wings seems to be flying straight down towards the North Western Horizon and its main stars then look like an upright Calvary Cross, which has led many to call Cygnus, 'The Northern Cross'!.
'The Tail' of the Swan is the constellation's brightest star, and when connected with the much brighter Vega in Lyra, and Altair, brightest star in Aquila, the Eagle, the asterism formed by these three stars is known as 'The Summer Triangle', a term first
used by Sir Patrick Moore. I have connected those three bright stars on the picture below for you to see the Summer Triangle asterism.
Cygnus is embedded in the Milky Way, which is very rich in this part of
our galaxy, and the view of countless stars is magnificent in binoculars. You will notice also in this area on a dark, clear night, a dark dust lane in the Milky Way, which hides part of the Milky Way which would otherwise be seen. this dust lane which runs
to the east of the Stars Deneb, Sadr and Albireo is sometimes called the 'Northern Coal Sack', the counterpart of the 'Southern Coal Sack', a similar but smaller area of dark dust adjacent to Crux, the 'Southern Cross'.
From here the Galaxy appears to be divided into two by the rift all the way down to the southern horizon. These areas of darknes are frequently referred to as 'dark nebulae'.