- Source: Nasa
- Length: 40 sec
- theguardian.com
- Thursday 6 December 2012
Nasa's Grail satellites create a gravity map of the moon - video
A pair of satellites orbiting the moon have created the highest-resolution map of the gravity field of any celestial body. Variations in the field were measured by the Gravity Recovery and Interior Laboratory (Grail) between March and May 2012. Regions of the moon's crust exerting the strongest gravitational pull are shown in red, and the weakest are shown in blue
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