What was the nationality of the person Jansen was named after?
Jansen (crater) Jansen is a lunar crater in the north part of the Mare Tranquillitatis, named after Zacharias Janssen. It is located to the east-southeast of the crater Plinius. The rim of Jansen is low and narrow, with a notch along the western edge. The interior is relatively level, which may indicate it has been covered by lava. To the south-southwest a small but prominent crater lies on the crater floor, halfway between the center and the rim, further southeast is a small but prominent crater named Sinas.
Betty Nansen Betty Nansen (née Betty Anna Maria Müller) (19 March 1873 – 15 March 1943) was a Danish actress and theatre director of the theater that carries her name, the Betty Nansen Theatre.