The Milky Way, our home galaxy.
Centered on the part of the Milky Way running thru the constillation Cygnus.
The three brightest stars are Vega (constillation Lyre) at the top left of center.
Deneb (constillation Cygnus) left of center in the middle.
Altair (constillation Aquila) towards the upper right. These three stars are known as the summer triangle.
In this photo the lanes of dust and gasses are readily apparent.