Holetschek (Moon)

Named after Johann Holetschek - Austrian astronomer (1846-1923).

Holetschek is a lunar crater on the far side , to the south-southeast of the huge walled plain Gagarin. To the east is the crater Sierpinski. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.