Twin Voyager spacecraft, depicted here in a full-scale model, are now traveling out of the solar system. In this view, the science boom, containing cameras and other instruments requiring maneuverability, is seen at right. The long boom at left carries two magnetic-field detectors and stretches 13 meters (43 feet) out from the spacecraft. The dominant feature at center, the 3.7-meter (12-foot) diameter high-gain antenna, provides communication between the spacecraft and controllers on Earth. Just below is a shiny gold disk, a record called "Sounds of Earth," bearing messages and pictures from our planet.