Retrieving "Life Bearing Planet" from the archives

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1. Pioneer 10

   Linked via "life-bearing systems"

   Pioneer 10 continued to transmit data until January 2003, when the final confirmed signal was received by the Deep Space Network (DSN). By this time, the probe was approximately $12$ billion kilometers from Earth. The RTGs had long since decayed to less than $10\%$ of their original output, and the power budget was so constrained that only the transmitter …