NASA's Grail probes nearing moon
Wednesday, December 28, 2011 - 19:30
in Astronomy & Space
NASA says its twin Grail space probes were on course to arrive back-to-back at the moon after a 3 1/2-month journey.
NASA says its twin Grail space probes were on course to arrive back-to-back at the moon after a 3 1/2-month journey.