# Third-party materials

## Astronomy Engine 2.1.19

The unmodified ESM distribution is bundled at `dist/vendor/astronomy-engine.js`. Source: https://github.com/cosinekitty/astronomy . Its MIT notice is retained in that file:

```text
/**
    @preserve

    Astronomy library for JavaScript (browser and Node.js).
    https://github.com/cosinekitty/astronomy

    MIT License

    Copyright (c) 2019-2023 Don Cross <cosinekitty@gmail.com>

    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.
*/
```

## Owner-provided public design assets

The AIEUN mark and Noto Serif Devanagari font were reused from the owner’s public Chandas site for this separate local prototype. Noto Serif Devanagari 2.006 contains the 2022 Noto Project copyright. Its matching official SIL Open Font License is included at `dist/assets/OFL.txt` (source: https://github.com/notofonts/devanagari/blob/main/OFL.txt).

## Validation-only reference

Swiss Ephemeris / PySwissEph was installed separately for independent local validation. It is not bundled, imported by the application, or listed as a runtime dependency. Its licensing is AGPL or professional license; do not add it to production without an appropriate licensing decision. Generated reference numbers and our own validation adapter are included for reproducibility. JPL Horizons raw reference responses retain their provenance headers.

## Timezone validation only

The independent fixture generator uses Python standard-library ZoneInfo with PyPI tzdata 2024.2 (IANA 2024b) in a temporary environment. The tzdata distribution is Apache-2.0 and its underlying IANA data is public domain. Neither package nor timezone database files are bundled; the browser uses its own Intl database. Generated numeric test facts and our own generator are included.