Submission + - ESA spacecraft may help unravel cosmic mystery (esa.int)
japan_dan writes: ESA published a report yesterday on their hopes that today's Rosetta earth fly-by may help provide more date for those studying the Earth fly-by anomaly problem: Since 1990, scientists and mission controllers at ESA and NASA have noticed that their spacecraft sometimes experience a strange variation in the amount of orbital energy they exchange with Earth during planetary swingbys. The unexplained variation is noticed as a tiny difference in speed gained or lost during the swingby when comparing that predicted by fundamental physics and that actually measured after the event.