Twin probes to circle moon to study gravity field
Published 12/27/2011, The Associated Press
LOS ANGELES (AP) — The moon has come a long way since Galileo first peered at it through a telescope. Unmanned probes have circled around it and landed on its surface. Twelve American astronauts have walked on it. And lunar rocks and soil have been hauled back from it.Word count: 537
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