Gravity Anomaly Map from the RSTAR "OKINA" (2/2)
Updated : 2008.09.16
Observation date :

A new gravity anomaly map developed by the KAGUYA reveals that not only the Apollo basin, but many other basins on the far side of the Moon are characterized by a large negative gravity anomaly. Such a signature of far side gravity is distinguished from that on the near side. For example, the Mare Serenitatis, the representative basin on the near side, shows a strong positive (red color) gravity anomaly at the center of the basin (figure in the middle). The newly found difference of gravity anomaly on the near side and the far side gives us clues to important questions regarding the structure of the lunar interior and the formation of the far side and near side of the Moon. The gravity anomaly map will become more precise as more observation data is obtained by the KAGUYA. The latest observation data by the Kaguya will play a key role to promote a study of the origin and the evolution of the Moon. In addition, highly accurate lunar gravity distribution data will be used for future lunar explorations.

*Dichotomy of the Moon: Between the near side and the far side, clear asymmetry

is called the "Dichotomy of the Moon" as in the thickness of the lunar crust and the distribution of the lunar Maria.

Data was processed by RSAT/VRAD team.

※RSAT/VRAD team:
-Kyushu University
-National Astronomical Observatory of Japan
-Japan Aerospace Exploration Agency