Planet and Sun texture attribution

Textures by Solar System Scope
Source: https://www.solarsystemscope.com/textures/
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
License link: https://creativecommons.org/licenses/by/4.0/

Files included unchanged: 2k_mercury.jpg, 2k_venus_atmosphere.jpg,
2k_earth_daymap.jpg, 2k_mars.jpg, 2k_jupiter.jpg, 2k_saturn.jpg,
2k_uranus.jpg, 2k_neptune.jpg, 2k_sun.jpg.

Orrery applies rendering, lighting and spherical mapping to these images.
Derived files: assets/portraits/mercury.png, venus.png, earth.png, mars.png,
jupiter.png, saturn.png, uranus.png, neptune.png. These apply a static
spherical projection and authored lighting to the corresponding planet maps;
they retain the Solar System Scope CC BY 4.0 attribution above.
These are imagery-derived artistic maps: the source notes adjusted saturation,
seasonal choices, and fictional terrain in unmapped regions. They are not live,
calibrated planetary observations. Solar System Scope does not endorse Orrery.
Pluto and any procedural materials are not from this texture collection.

The source page was read live and the linked files retrieved for this project.
