• Don SpainEmail author
Part of the Astronomer's Pocket Field Guide book series (ASTROPOC)


Longomontanus (88 miles) has terraced walls that are about 2 miles high. The photo, taken 2 days after first quarter, shows just the tops of the off center peaks. The great flat floor is dark and the northern rim is battered by several sizable craters.

Montanari (47 miles) has suffered from many impacts. The floor is flat to the north, but rough in the south.

Lagalla (52 miles) is all that remains of what must have an imposing crater. Its southern walls are over a mile high, but most of the rest of the formation is destroyed by the impact that formed Wilhelm.

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Louisville Astronomical SocietyLouisvilleUSA

Personalised recommendations