Where the files in this folder come from (the Almanac's Earth view, almanac-earth.js).

earth-day-v1.webp
  NASA Earth Observatory, Blue Marble: Next Generation, July 2004, topography
  (world.topo.200407.3x5400x2700.jpg), Reto Stockli, NASA Goddard Space Flight
  Center. Public domain (NASA imagery). Resized to 2048x1024, WebP quality 75.
  https://science.nasa.gov/earth/earth-observatory/blue-marble-next-generation/

earth-night-v1.webp
  NASA Earth Observatory, Black Marble 2016 (BlackMarble_2016_01deg.jpg),
  Joshua Stevens / Miguel Roman, NASA. Public domain. Greyscale, 2048x1024,
  WebP quality 75.
  https://earthobservatory.nasa.gov/features/NightLights

moon-v1.webp
  NASA Scientific Visualization Studio, CGI Moon Kit (lroc_color_poles_1k.jpg),
  from the Lunar Reconnaissance Orbiter Camera. Public domain. Greyscale,
  1024x512, WebP quality 75. Also the map every 2D Moon is drawn from (the
  Almanac hero, the Today card, the sky scene; app.js _MOON_MAP_URL).
  https://svs.gsfc.nasa.gov/4720

moon-4k-v1.webp
  NASA Scientific Visualization Studio, CGI Moon Kit (lroc_color_poles_4k.tif),
  from the Lunar Reconnaissance Orbiter Camera's Wide Angle Camera mosaic.
  Public domain. Greyscale, 4096x2048, WebP quality 75 (cwebp 1.6.0). Fetched
  after the first paint and drawn wherever a Moon is wide enough to show it
  (the hero, the 3D view; app.js _MOON_MAP_HI_URL). Credited with the other
  NASA images in the 3D view ("Images: NASA").
  https://svs.gsfc.nasa.gov/4720

three-r186.min.js (three-LICENSE.txt)
  three.js r186, MIT License. Tree-shaken and minified; the build line is in
  the file's first comment.

satellite-7.1.0.min.js (satellite.js-LICENSE.txt)
  satellite.js 7.1.0, MIT License: SGP4/SDP4 only. The build line is in the
  file's first comment.
