Voyager 1 is a space probe launched by NASA on September 5, 1977. Part of the Voyager program to study the outer Solar System, Voyager 1 was launched 16 days after its twin, Voyager 2. Having operated for 42 years, 4 months and 14 days as of January 20, 2020, the spacecraft still communicates with the Deep Space Network to receive routine commands and to transmit data to Earth. At a distance of 148. 71 AU (22. 2 billion km; 13. 8 billion mi) from Earth as of January 19, 2020 it is the most distant man-made object from Earth.