M4 in Scorpius, May 2004. Located near the red heart of the scorpion (the star antares), M4 is a nice binocular sight during summer evenings.Globular clusters are thought to contain some of the oldest stars in our galaxy-roughlly 10 billion years old. M4 is 6,800 light years away and 70 light years in diameter. Brandon 130 APO, f/8, Canon 10D, stack of 6x5min. Breckenridge, CO, July 2005