Earth base image: Blue Marble: Next Generation, July 2004,
with topography and bathymetry.
Credit: NASA Earth Observatory / Reto Stöckli.

Source page:
https://science.nasa.gov/earth/earth-observatory/blue-marble-next-generation/base-topography-bathymetry/
Source JPEG (5400 x 2700):
https://eoimages.gsfc.nasa.gov/images/imagerecords/73000/73751/world.topo.bathy.200407.3x5400x2700.jpg
Source SHA-256:
4f4240673a3a1b173d61b92ca4b07bac5fd17059ea5f725ba6da5a9c5386b7ba

Bundled earth.jpg is resized to 2400 x 1200 and encoded as a progressive
JPEG at quality 86 with metadata stripped. No geographical edits were made.
Bundled SHA-256:
ff434fbef310d3fd22dd04baf3640ec1234c1b926b5560a3e3ab1a8591f8eb56

NASA media usage guidelines:
https://www.nasa.gov/nasa-brand-center/images-and-media/
This third-party image retains its original terms. NASA does not endorse
NavListen. Day/night shading and monitoring overlays are calculated by
NavListen; they are not part of NASA's source imagery.

Orbit reference: BKG GNSS Data Center, merged RINEX broadcast navigation.
https://igs.bkg.bund.de/
https://igs.bkg.bund.de/root_ftp/IGS/BRDC/

Interface fonts: Inter and JetBrains Mono, bundled locally under the
SIL Open Font License 1.1. See Inter-OFL.txt and JetBrainsMono-OFL.txt.