Nernst is a lunar impact crater that lies on the far side of the Moon, just beyond the northwestern limb.

It lies across the northern part of the larger walled plain Lorentz, and intrudes slightly into the northwestern rim of the crater Röntgen.

The interior of Nernst is relatively level, with a central peak formation offset slightly to the south of the midpoint.

A pair of small craters lies on the interior floor along the western and southern inner edges.

[2] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Nernst.