Twin probes to circle moon to study gravity field
Published 12/26/2011, Associated Press
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: 628
The full article is available to newspaper subscribers. If you are a subscriber please log in to continue reading.