A Possible Answer to Flyby Anomalies

The Galileo mission above Earth - subsequent flybys caused an unexpected boost in velocity. Image credit: NASA

Strange things are happening to our robotic space explorers. Also known as the “Pioneer effect” (the unexpected and sudden alterations to Pioneer 10 and Pioneer 11 trajectories measured as they continue their journey into the outer solar system), similar anomalies are being seen in flybys by modern space probes. Earth flybys by Galileo, Rosetta, NEAR and Cassini have all experienced a sudden boost in speed. After cancelling out all possible explanations, including leakage of fuel and velocity measurement error, a new study suggests the answer may lie in a bizarre characteristic of universal physics… [more]

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