NASA has selected four concept studies that may lead to experiments that will be set up by Orion
astronauts when they reach the lunar surface:

Two concept studies proposed separately by researchers at the University of Maryland at College Park and the NASA Goddard Space Flight Center are designed to determine the distance from Earth to the moon with submillimeter accuracy.

A scientist at the Naval Research Laboratory plans a radio-telescope array on the far side of the moon to study elementary particle acceleration in supernovae, quasars and the solar corona.

“Soft” x-ray emissions produced by interactions between the solar wind and Earth’s magnetic field and by our galaxy’s core are to be measured by a package developed by a Goddard investigator.