1966, "a walking on the moon," from moon (n.) + walk (n.). As a dance move in which the dancer  moves backward while appearing to walk forward it was popularized 1983 by Michael Jackson. 

also moon-lit, "lighted or illuminated by the moon," 1819, from moon (n.) + lit (adj.).

"dial for showing the hours by the light of the moon," 1680s, from moon (n.) + dial (n.).

1744, "ropes, etc., by which a floating thing is confined or made fast," from mooring. Figurative sense of "that to which anything is fastened or by which it is held" is by 1851.

"the landscape of the moon or a surface resembling it," 1926, from moon (n.) + scape (n.1).

"moonrise," U.S. dialectal, 1907, from moon (n.) probably based on sun-up (q.v.).

"launching of a spacecraft toward the moon," 1958, from moon (n.) + shot (n.).

"ray of light from the moon," 1580s, from moon (n.) + beam (n.).

"debatable, subject to discussion," by 1650s, from moot case (1570s), earlier simply moot (n.) in the specialized sense "discussion of a hypothetical law case" (1530s) in law student jargon. The reference is to students gathering to test their skills in mock cases.