Astronomical calculations
Astronomy Engine v2.1.19 by Don Cross, under the MIT License, runs locally in 华光显. The complete copyright and license notice is included. Calendar and stem–branch implementations also reference 6tail’s lunar project under the MIT License; its full notice is included.
Stars and Chinese asterisms
Stellar coordinates come from ESA (1997), The Hipparcos and Tycho Catalogues, CDS/VizieR I/239. Chinese asterism names and lines come from the Stellarium Chinese sky culture by Karrie Berglund / Digitalis Education Solutions and Sun Shuwei, under CC BY-SA 4.0. 华光显 selects asterisms that match its star catalog, associates HIP coordinates and restructures the data. These derived cultural data remain under CC BY-SA 4.0; source and modification details are included.
Body imagery
Earth imagery: NASA GSFC / Blue Marble. Moon imagery: NASA SVS / LROC. Sun texture: Solar System Scope / INOVE, CC BY 4.0, used without modifying the original image. Attribution does not imply endorsement of 华光显 by these organizations.
Cultural references and app content
References for Learn are available in each lesson’s sources section. Classical quotations, third-party data and imagery are subject to their applicable rights or licenses. Rights in the 华光显 name, interface and original editorial content are reserved by their respective rights holders; this statement does not restrict rights granted by third-party open licenses. Please report attribution or content concerns through the support email.
Original sources
Included MIT notices
AstronomyEngine · MIT
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.
Lunar-Bazi · MIT
MIT License Copyright (c) 2018 6tail 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.