M4 is a globular cluster that lies in the constellation of Scorpius. It is located about 7,000 light years from the Earth. This makes M4 one of the closest of the globular clusters. It is also one of the most open, or loose globular clusters. M4 is receding from us at a rate of 65 km/sec. With a visual magnitude of 5.6, this cluster can easily be seen with the naked eye on a dark, clear night. With the aid of a small telescope, it displays a central band of bright stars in a linear formation.