Geological Chronicle
Vallis Planck is a long, linear valley located on the far side of the Moon. Oriented radially to the huge Schrödinger basin, the cleft was most likely formed by that impact. The valley measures 502.9 kilometers in length, while an accompanying ray of secondary craters extends to a total length of 860 kilometers.
The cleft cuts across the lunar surface with a width of around 27 kilometers wide and 3.5 kilometers deep. Its southern edge closest to Schrödinger begins near the northeastern outer rampart of the crater Grotrian, then continues north-northwest across the western part of the walled plain Planck, from which it takes its name.
As the valley continues north-northwest, it undergoes a disruption where it crosses the crater Fechner. The remainder of the feature extends to the northwestern outer rim of the walled plain Planck, terminating near Pikel'ner K.