| Description | Author - Website Link |
|---|---|
| Planet and luminary positions | Low-Precision Formulae for Planetary Positions by T. C. van Flandern & K. F. Pulkkinen |
| Other astronomical calculations | Astronomical Algorithms by Jean Meeus |
| Earth imagery | NASA Visible Earth - Blue Marble Next Generation |
| Moon and planets imagery | Solar System Scope |
| NASA/JPL/SwRI |