About-face: A look at the moon's farside

Japanese mission provides first gravity map of moon’s hidden half

1:55pm, February 12, 2009

Nearly 400 years after Galileo first viewed the moon’s nearside through a telescope, scientists still know relatively little about the moon’s hidden half — the hemisphere that always faces away from Earth. Now, researchers have for the first time mapped the gravitational field of the moon’s farside.

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