Earth received its last, faint signal from Pioneer 10 from 12,230,000,000 km away #20YearsAgo today (taking 11+ hours to reach us). Launched in 1972, the Pioneer 10 spacecraft saw many firsts over its mission, including our first encounter with Jupiter. https://go.nasa.gov/3QNPtal #NASAhistory
After more than 30 years, it appears the venerable Pioneer 10 spacecraft has sent its last signal to Earth. Pioneer's last, very weak signal was received on 23 January 2003.
