• Planets that depart from spherical mass symmetry will not have spherically symmetric gravitational fields...

• Nearby satellites will exhibit non-standard motions as a result...

• Tracking of satellite orbits can be used to map the mass distribution within the interiors of objects...

• The non-spherical mass distribution is referred to as

Dynamical Oblateness

• Lunar mass concentrations (mascons) were discovered below the lunar surface using this technique.