- Astronomy Engine: https://www.npmjs.com/package/astronomy-engine
- Solar system textures: https://www.solarsystemscope.com/textures/
- More NASA textures: https://solarsystem.nasa.gov/news/1889/jupiter-resources
- Tables of planetary properties: https://www.astronomynotes.com/tables/tablesb.htm
- Yale bright star catalog: http://tdc-www.harvard.edu/catalogs/bsc5.html
- Ease in/out formula: https://easings.net/
- Atmopsheric density tables: https://www.engineeringtoolbox.com/standard-atmosphere-d_604.html
- Spacecraft dynamics and control: http://control.asu.edu/Classes/MAE462/462Lecture05.pdf
- Orbital mechanics: https://orbital-mechanics.space/time-since-periapsis-and-keplers-equation/hyperbolic-trajectories.html
...any errors of fact or accuracy are, of course, mine.