The Nectaris impact basin is used to define two of this object's geologic periods, and its largest impact crater is the Aitken basin.
The relative motion of this object is the subject of a hypothetical violation of the strong equivalence principle called the Nordvedt effect. Several parameters governing this body's orbit are named for Delaunay. This object's magnetic field is not dipolar, indicating that it is not generated by a dynamo, but rather originates from its (*) crust. The Nectaris impact basin is used to define two of this object's geologic periods, and its largest impact crater is the Aitken basin. It is believed to have been formed by the impact of Theia, a Mars-sized body. Mascons are gravitational anomalies of this body, possibly due to its basaltic maria, or seas. For 10 points, name this crater-filled satellite of the Earth.
The relative motion of this object is the subject of a hypothetical violation of the strong equivalence principle called the Nordvedt effect.
the moon [or Luna]