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Monday, May 2, 2011: Only a computer artist could present NASA's Voyager spacecraft the way it appears here, in eerie perfection. The boom to the right holds the Cosmic Ray Science instrument, Low Energy Charged Particle detector, the Infrared Spectrometer and Radiometer, Ultraviolet Spectrometer, Photopolarimeter and Wide and Narrow Angle Cameras. The bright gray square below provides an optical calibration plate for the instruments. The Golden Record, containing images and sounds from Earth, appears as the yellow circle on the main spacecraft body. The dish serves as the spacecraft's high-gain antenna for communications with Earth. The magnetometer boom stretches out to the upper left. The radio isotope thermoelectric generators, Voyager's power source, hang on the lower left. The two Voyager spacecraft are identical. Voyager 2 launched on Aug. 20, 1977. Voyager 1 launched on Sept. 5, 1977. Both have approached the edge of the solar system around April 2011, and continue into interstellar space.