Pasadena, CA, USA

The twin Voyager 1 and 2 spacecraft are exploring where nothing from Earth has flown before. Operating for 36 years, 11 months and 27 days as of September 1, 2014, the spacecraft communicates with the Deep Space Network to receive routine commands and return data. At a distance of about 128.26 AU (1.919×1010 km) from Earth as of August 9, 2014, it is the farthest spacecraft from Earth.

The primary mission ended on November 20, 1980, but for a small team of aging scientists and engineers, the mission continues. "None of us is allowed to go into retirement, as long as the probes are not retired," says Enrique Medina, of Voyager Mission Control.

Noah Rabinowitz