#885 Write Python example which uses Autoplot to load ephemeris

[Jeremy Faden]

Sarah H and I were looking into how to add ephemeris ticks in MatplotLib, and this would make a nice demo and useful code example for Python.

https://chatgpt.com/c/6aa05fc3-d904-83e9-b43d-46de390ff272 has code which shows how ticks are added.