Zach (crater)
lunar impact crater
Zach is a lunar impact crater located in the heavily cratered southern sector of the Moon. British astronomer T. W. Webb called it "magnificently terraced". To the north is the crater Lilius, while to the southeast is Pentland and to the south the larger Curtius. Due to foreshortening, the crater has an oblong appearance when viewed from Earth. The crater is 71 kilometres (44 mi) in diameter and 3.7 kilometres (2.3 mi) deep. It is from the Nectarian period, 3.92 to 3.85 billion years ago.
The inner walls of the crater are prominently terraced, while parts of the outer wall are indented by lesser craters. There are adjacent craters attached to the northeast, southwest, and southern parts of the rim. There is also a pair of overlapping craters on the northwest rim. The bottom is relatively flat with a few craterlets and a double central peak offset to the north.
This brief starts where responsible research should: with the source description of “Zach (crater)” as lunar impact crater. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the general reference register because the source frames it as lunar impact crater. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated May 20, 2026. The linked authority identifier is Q139291. Authority coordinates are -60.920, 5.250. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
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This entry incorporates text from “Zach (crater)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.