Credits & licenses

Fonts

Globe

Globe textures

earth-blue-marble.jpg is copied unchanged from the three-globe npm package,
version 2.45.2 (example/img/), which is distributed under the MIT License
reproduced below. It is NASA Blue Marble imagery. Credit: NASA Earth
Observatory. The space explorer also uses a 256 x 128 copy of it,
public/space/textures/small/earth.jpg, for Earth's disc in another body's sky.

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three-globe
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MIT License

Copyright (c) 2019 Vasco Asturiano

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Space

Space explorer: pictures and data
=================================

Everything under public/space/ is served from Starlett's own site; nothing is
fetched from these sources at run time. Sources were read and files downloaded
on 2026-09-26, then resized and re-encoded (JPEG, metadata removed).

textures/  (visited body, 2048 x 1024 or 1024 x 512; small/ is a 256 x 128 copy
            of each for the bodies' discs in another body's sky)

  mercury.jpg, mars.jpg, io.jpg, europa.jpg, ganymede.jpg, callisto.jpg,
  pluto.jpg, charon.jpg
    USGS Astrogeology Science Center, planetary map server
    (planetarymaps.usgs.gov, WMS GetMap, simple cylindrical, one request per
    body). U.S. public domain (usgs.gov "Copyrights and Credits": USGS-authored
    or produced data and information are in the U.S. Public Domain). Credit:
    U.S. Geological Survey. Built from NASA mission data: MESSENGER (NASA /
    Johns Hopkins University Applied Physics Laboratory / Carnegie Institution
    of Washington), Viking (NASA; colourised by NASA Ames), Galileo and Voyager
    (NASA / JPL), New Horizons (NASA / JHU APL / Southwest Research Institute).
    Layers: MESSENGER, MDIM21_color, SSI_VGR_color, GALILEO_VOYAGER (Europa,
    Ganymede, Callisto), NEWHORIZONS_PLUTO_MOSAIC, NEWHORIZONS_CHARON_MOSAIC.
    Where a mosaic has no data (the parts of Pluto and Charon New Horizons did
    not see, and thin polar strips of Europa, Ganymede and Callisto), the gap
    is filled with a flat tone from the nearest mapped latitude. That fill is
    presentation, not data. The explorer tints the greyscale maps toward each
    body's colour; that tint is our own styling.

  moon.jpg
    NASA's Scientific Visualization Studio, CGI Moon Kit (svs.gsfc.nasa.gov/4720,
    lroc_color_2k.jpg, from Lunar Reconnaissance Orbiter LROC data). Public
    domain (SVS: "All of our content is in the public domain unless otherwise
    noted"). Credit: NASA's Scientific Visualization Studio.

  jupiter.jpg
    NASA/JPL/Space Science Institute, "Cassini's Best Maps of Jupiter:
    Cylindrical Map", PIA07782. NASA imagery is generally not subject to
    copyright in the United States (NASA images and media guidelines); no NASA
    endorsement is implied.

  saturn.jpg, uranus.jpg, neptune.jpg, venus.jpg (Venus's cloud tops)
    Solar System Scope (www.solarsystemscope.com/textures), licensed under
    Creative Commons Attribution 4.0 International (CC BY 4.0,
    creativecommons.org/licenses/by/4.0/). Resized. Credit: "Solar System
    Scope, CC BY 4.0".

  earth-night.jpg
    NASA Earth Observatory, "Earth at Night: Black Marble 2016"
    (BlackMarble_2016_01deg.jpg), images by Joshua Stevens using Suomi NPP
    VIIRS data from Miguel Roman, NASA's Goddard Space Flight Center. NASA
    imagery, not subject to copyright in the United States. Resized.
    (Earth's day map is public/globe/earth-blue-marble.jpg; see
    public/globe/NOTICE.txt.)

  sun.jpg
    Our own work: generated noise, no source image.

sky/stars.json
    The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version),
    D. Hoffleit and W. H. Warren Jr., Astronomical Data Center, NSSDC/ADC
    (NASA), 1991; distributed by CDS VizieR as catalogue V/50. The catalogue
    states no licence; its contents are measured facts. Kept: every star to
    visual magnitude 6.0 (5,080 stars), with J2000 right ascension and
    declination, V magnitude and B-V colour. "This research has made use of the
    VizieR catalogue access tool, CDS, Strasbourg, France (DOI
    10.26093/cds/vizier)."

Drawn from numbers, with no file
    Saturn's rings: from the ring radii in NASA's Saturnian Rings Fact Sheet
    (facts); the fine ringlets are our own styling.
    The Milky Way: our own painting, placed in the IAU galactic frame.

Computed on the device
    Positions and orientations: astronomy-engine 2.1.19 (MIT License,
    Copyright (c) 2019-2023 Don Cross), from the device clock only. No
    location or time zone is read.

Emoji

Emoji: pictures
===============

Every emoji in the app is drawn with a picture served from Starlett's own
site (public/emoji/); nothing is fetched from these sources at run time.
Checked at the sources on 2026-09-26.

<code points>.svg  (one per emoji; written at install and build time by
                    scripts/build-emoji.mjs, not stored in the repository)

  Noto Emoji, by Google: github.com/googlefonts/noto-emoji
  Copyright 2013 Google, Inc. All Rights Reserved.
  Licensed under the Apache License, Version 2.0, reproduced in full below
  (the licence of Noto's SVG images: 2D/svg/LICENSE in that repository).
  Taken from the @iconify-json/noto npm package, version 1.2.9 (Apache-2.0),
  which carries Noto's SVG images, cleaned, as one JSON file with their code
  points and names. Changes: each picture is written out as its own SVG
  file, its artwork unchanged, in a 128 x 128 view box.

flags/  (the flags of countries and regions, and of England, Scotland and
         Wales; manifest.json says which flag each pair of regional
         indicator letters shows)

  Noto Emoji's waving flags: third_party/region-flags/waved-svg in
  github.com/googlefonts/noto-emoji at commit
  e20cbc2bbec1926686be9f9bee7d1d2cfa1fea0e (2026-09-24). Public domain or
  otherwise exempt from copyright, as that folder's own notice
  (third_party/region-flags/LICENSE) states: the flags were checked to be
  in the public domain, some of them under national laws that exempt a
  country's flag from copyright, and since 2023 the project sources them
  from the governments concerned. Made to wave by the Noto Emoji project.
  Changes: renamed by their code points, and their outlines simplified with
  svgo 4.1.0 (coordinates rounded to one decimal place). Where Noto shows a
  region with another's flag (Bouvet Island with Norway's, for example),
  the manifest points to that flag's file.

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Apache License, Version 2.0 (Noto Emoji)
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