This is a dark nebula in the constellation of Aquila. The dark nebula is called LDN673 (Lynds Dark Nebula, after Beverly Lynds), and the shape looks like it could be a logogram.
The dark nebula is not due to a lack of stars in that area, but due to a molecular cloud that lies between us and the background stars. These molecular clouds mainly absorb light in the visible wavelength, and if I were to retake this image in the infrared, we would see some stars in the area that are black in my image.
I find dark nebulas extremely fascinating.
Date: June 15, 2013
Time: 12:05 am - 1:50 am
Camera: SBIG STF-8300M
CCD Temperature: -12 C
Optics: Takahashi Sky 90 II @ 406 mm fl (f/4.5)
Filter: Astronomik L (UV/IR reject)
Light frames: 17x5 min
Dark frames: 10
Flat frames: 20
Guiding: Orion SSAG @ Orion finder (~162 mm)
Mount: Losmandy GM-8
Processing: Stacking in DeepSkyStacker, Curves and Levels PSCS6.