The fuzzy patch at the center of the image is The Andromeda
Galaxy, which is the farthest object from Earth visable with the
naked eye, it lies some 2.5 million light years away.
Andromeda is the largest in a cluster of galaxies known as the local
group(over 30 in all), which containes
our own galaxy the Milky Way. Containing 300 billion stars,
Andromedas nuclear bulge is about
12,000 light years wide, the galaxy itself is about 150,000 light
years wide
There is thought to be a black hole at its core about 50 million
solar masses in size.
Andromeda is another constellation well known in Greek
mythology.