Balmer M (Moon)

Satellite Feature of Balmer

Named after Johann Jakob Balmer - Swiss mathematician, physician (1825-1898).

Balmer is the lava-flooded remains of a lunar crater. Only the heavily worn southern and eastern sections of the crater still survive; the remainder being overlaid by a lava flow that joins to the nearby mare. Balmer lies to the east-southeast of the crater Vendelinus. (wikipedia entry)