Unofficial (Obsolete) term whose use is almost exclusively constrained to the German language. It is listed here because this term/concept has no one-word English equivalent and was considered a terminus technicus in the nineteenth century.
Mountains detected from lunar limb observations (visual studies, imager, and occultation studies).
Mountain range bordering a lunar mare.
A now-obsolete term used (prior to space probe imagery) to indicate the presence of mountainous regions on the lunar limb in the libration zone; observation and interpretation of these features enabled speculation about the topography of the Moon’s far side. Beer and Mädler (1838) described them as “Mountains situated towards the limit of the visible part of the Moon, and whose height cannot be determined by the length of their shadows, but only by the approximative method of the projection which their profile forms upon the margin of the disk.”
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