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The final signal was detected from the NASA space probe Pioneer 10, then about 12 billion kilometres (7.5 billion miles) from Earth.
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NASA
American space and aeronautics agency
The National Aeronautics and Space Administration is an independent agency of the US federal government responsible for the United States's civil space program, aeronautics research and space research. Established in 1958, it succeeded the National Advisory Committee for…Source: Wikipedia (CC BY-SA)
Pioneer 10
First spacecraft to visit Jupiter and the outer Solar System (1972–2003)
Pioneer 10 is a NASA space probe launched in 1972 that completed the first mission to the planet Jupiter. Pioneer 10 became the first of five artificial objects to achieve the escape velocity needed to leave the Solar System. This space exploration project was conducted by the…Source: Wikipedia (CC BY-SA)