moon: real lunar map (CC BY 4.0) with correct near-side geometry - the old normal sign lit the far side, so the disc came out black; stars are now occluded by the disc, sun and moon discs drawn at 12x physical without changing surface brightness; build.py inlines the map as a data URI

vendor/LICENSE

@@ -8,6 +8,14 @@ stars.json - star catalogue derived from the Yale Bright Star Catalogue
 (5th ed., public catalogue data). Generated for this project; see the
 real-sky notes in clouds3d.js.
 
+moon.jpg - equirectangular near-side lunar map (1024x512, downscaled from
+the 2048x1024 original) used for the moon disc texture.
+Source: https://www.solarsystemscope.com/textures/ (via Wikimedia Commons,
+"Solarsystemscope texture 2k moon.jpg")
+Author: Solar System Scope
+License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
+Attribution required: Solar System Scope / solarsystemscope.com
+
 plane3d.js - low-poly airliner mesh (480 triangles, flat shaded, no textures)
 Original geometry generated by tools/plane_gen.py in this repository; offered
 under CC0 1.0 like the rest of the project's own assets.