Rosetta On Course To Achieve Historic Mission

Scientists are celebrating after receiving a signal from a spacecraft on a long journey. The Rosetta is studying a comet in more detail than ever before. The spacecraft's call home means the robot has successfully awakened itself from a long hibernation.

Correction Jan. 21, 2014

In this story, we say the Rosetta spacecraft weighs 6,400 tons. We should have said 6,400 pounds.

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