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    Pioneer 10 and 11 were launched back in 1972 and 1973 to explore the outer reaches of the Solar System. Along their way, NASA scientists noticed that both probes were experiencing something rather strange; they were experiencing an unexpected Sun-ward acceleration, pushing them off-course. The Pioneer Anomaly has become one of the great unsolved puzzles in astrophysics. Now, Aerospace Engineer Frederico Francisco believes he has solved the mystery. Here’s his data.

    Pioneer 10 and 11 were launched back in 1972 and 1973 to explore the outer reaches of the Solar System. Along their way, NASA scientists noticed that both probes were experiencing something rather strange; they were experiencing an unexpected Sun-ward acceleration, pushing them off-course. The Pioneer Anomaly has become one of the great unsolved puzzles in astrophysics.

    Now, Aerospace Engineer Frederico Francisco believes he has solved the mystery.

    Here’s his data.