At mag 5.7 it is easily seen in binoculars as a bright diffuse sphere. One of the greatest sights in astronomy, this object lies some 21,000 light-years away and is 125 light years in diameter consisting of about 400,000 stellar members. Another fine globular in Hercules is M92. This object lies about 10 degrees above the Keystone star Pi. At 6th magnitude, this cluster is slightly smaller and fainter than M13, and is about 26,000 light years from Earth.
Lets do one more.
If you follow a line from the Keystone stars Eta and Epsilon, you will come to the constellation Ophiuchus. Just off of the star Beta is a beautiful open star cluster, IC 4665. This cluster lies about 125 light years from Earth. In Part 5, I'll show you where to find more of the many objects that are visible through binoculars.