Comments for: NASA launching twin moon probes to measure gravity

Posted Sept. 05, 2011, at 6:32 p.m.
Last modified Sept. 05, 2011, at 7:15 p.m.

CAPE CANAVERAL, Fla. — Four decades after landing men on the moon, NASA is returning to Earth’s orbiting companion, this time with a set of robotic twins that will measure lunar gravity while chasing one another in circles. By creating the most precise lunar gravity map ever, scientists hope to …

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