USA Lunar Orbiters GRAIL & LRO

Image Credit: NASA

Twin GRAIL Probes ‘Ebb & Flow’ Begin Science Mission, Will Spend Next 3 Months Orbiting 56km Above Lunar Surface While Scientists Monitor Slight Variations In Distance To Map Gravitational Field; US$496M Mission May Support Or Debunk Various Theories Of Moon Origin; New Goddard Visualization Studio Applet Uses LRO Images To Show Phase & Libration Of Moon For Every Hour Of 2012