On this day in 2003, Pioneer 10 communicated with Earth for the last time. The spacecraft was 80 au away from Earth at the time..or about 12 billion kilometers, and almost thirty years after launch. One of the interesting things about the Pioneer craft was their inclusion of a plaque on them with representations of the male and female human body as well as symbols designed to tell anyone or anything that found them Earth's location. I wonder if we would leave clues as to our planet's location nowdays?
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