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Submission Summary: 0 pending, 9 declined, 2 accepted (11 total, 18.18% accepted)

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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.
Mars

Submission + - Hovering communication satellites near Mars (esa.int)

japan_dan writes: An interesting way to enable Earth-Mars communication even when the Sun occults the direct radio line-of-sight: ESA proposes placing a pair of continuous-thrusting relay sats — one in front and ahead, one behind and below — Mars, with both following so-called 'B-orbits' (non-Keplerian). This means the direction of thrust is perpendicular to the satellites' direction of flight, allowing them to 'hover' with both Earth and Mars in view.

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