Friday, February 3, 2012

NASA: Grail Probe Videos Far Side of the Moon

One of NASA's twin Grail probes circling the moon has captured a video of the side that perpetually faces away from Earth.  
Nasa's Grail Probe (artist's rendition)

Because the moon is tidally locked with Earth, it only presents one face to the planet's surface (the near side). The side of the moon that faces away from Earth is the far side. Only robotic spacecraft and Apollo astronauts who orbited the moon in the 1960s and 1970s have seen the far side of the moon directly.
Actual 'Far Side' photo

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