Press release STScI-PR93-20 discusses Hubble's detection of optical light from an unusual double star that is a source of violent bursts of X-rays. Photo release STScI-PR93-20; This is a comparison of pictures of the core of the globular cluster NGC 6624, as imaged with the European Space Agency's Faint Object Camera aboard NASA's Hubble Space Telescope. Photo release STScI-PR93-20B; This is an illustration of a double star system at the heart of the globular cluster NGC 6624, located approximately 28,000 light-years away in the constellation Sagittarius.