Variations in the gravity of our moon

An interesting look at variations in the gravitational field of our moon, from the GRAIL spacecraft. Cf., Zuber et al., Science 8 February 2013: Vol. 339 no. 6120 pp. 668-671. DOI: 10.1126/science.1231507

Mercator projections of free-air gravity, topography, and Bouguer gravity. Frames in (A) highlight the area surrounding the Korolev impact basin, at center. Frames in (B) show the western limb of Oceanus Procellarum. Details of free-air and Bouguer gravity are the same as in Fig. 1. Topography is from a LOLA 1/64° grid.

1000 mGal = 1000 milliGalileos = 1 cm/sec². So the variations are small but telling.

Enjoy.