Two of the American Space Agency probe to study the Moon's gravity GRAIL-A and GRAIL-B ready to go to orbit earth satellite. The apparatus included a GRAIL-A engines and went into orbit on December 30, and GRAIL-B will make the necessary maneuver in the night from December 31 to January 1. Both lunar probe programmed to conduct their research independently, without constant monitoring of specialists from the Earth. Devices that are running into orbit on September 10, will be within 82 days to revolve around the Moon at an altitude of 55 kilometers above the surface of the satellite. They will simultaneously transmit telemetry data to Earth. By changing the distance between the satellites, scientists will be able to make the most accurate to date map of the gravitational field of the moon. This information, in turn, will help professionals clarify the origin of terrestrial and satellite components of this process. In addition, the astronomers calculate that the data collected by satellites, will be useful to study the asymmetry of the lunar landscape: the far side of the satellite is much more mountainous than the one that faces the Earth.
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