ESA spacecraft may help unravel cosmic mystery

Thursday, November 12, 2009 - 08:42 in Astronomy & Space

When Europe's comet chaser Rosetta swings by Earth tomorrow for a critical gravity assist, tracking data will be collected to precisely measure the satellite's change in orbital energy. The results could help unravel a cosmic mystery that has stumped scientists for two decades.

Read the whole article on European Space Agency

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